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man: fix small issue in AllowedMemoryNodes description
[thirdparty/systemd.git] / src / core / main.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
a7334b09 2
60918275 3#include <errno.h>
3dfc9763 4#include <fcntl.h>
f170852a 5#include <getopt.h>
664f88a7 6#include <sys/mount.h>
3dfc9763 7#include <sys/prctl.h>
b9e74c39 8#include <sys/reboot.h>
3dfc9763 9#include <unistd.h>
349cc4a5 10#if HAVE_SECCOMP
b64a3d86
LP		 11#include <seccomp.h>
12#endif
349cc4a5 13#if HAVE_VALGRIND_VALGRIND_H
3dfc9763
LP		 14#include <valgrind/valgrind.h>
15#endif
54b434b1 16
718db961 17#include "sd-bus.h"
cf0fbc49 18#include "sd-daemon.h"
b2e7486c 19#include "sd-messages.h"
3dfc9763 20
b5efdb8a 21#include "alloc-util.h"
2ffadd3c 22#include "apparmor-setup.h"
d9d93745 23#include "architecture.h"
3dfc9763
LP		 24#include "build.h"
25#include "bus-error.h"
26#include "bus-util.h"
430f0182 27#include "capability-util.h"
a88c5b8a 28#include "cgroup-util.h"
24efb112 29#include "clock-util.h"
3dfc9763 30#include "conf-parser.h"
618234a5 31#include "cpu-set-util.h"
3dfc9763 32#include "dbus-manager.h"
c18ecf03 33#include "dbus.h"
3dfc9763 34#include "def.h"
32429805 35#include "dev-setup.h"
c18ecf03 36#include "efi-random.h"
209b2592 37#include "efivars.h"
eee8b7ab 38#include "emergency-action.h"
3dfc9763 39#include "env-util.h"
57b7a260 40#include "exit-status.h"
3ffd4af2 41#include "fd-util.h"
3dfc9763 42#include "fdset.h"
718db961 43#include "fileio.h"
f97b34a6 44#include "format-util.h"
f4f15635 45#include "fs-util.h"
d247f232 46#include "hexdecoct.h"
3dfc9763
LP		 47#include "hostname-setup.h"
48#include "ima-setup.h"
49#include "killall.h"
50#include "kmod-setup.h"
eefc66aa 51#include "limits-util.h"
d7b8eec7 52#include "load-fragment.h"
3dfc9763 53#include "log.h"
b6e66135 54#include "loopback-setup.h"
b6e66135 55#include "machine-id-setup.h"
3dfc9763 56#include "manager.h"
32429805 57#include "mkdir.h"
3dfc9763 58#include "mount-setup.h"
d58ad743 59#include "os-util.h"
3dfc9763 60#include "pager.h"
6bedfcbb 61#include "parse-util.h"
7d5ceb64 62#include "path-util.h"
294bf0c3 63#include "pretty-print.h"
4e731273 64#include "proc-cmdline.h"
3dfc9763 65#include "process-util.h"
d247f232 66#include "random-util.h"
8869a0b4 67#include "raw-clone.h"
78f22b97 68#include "rlimit-util.h"
349cc4a5 69#if HAVE_SECCOMP
83f12b27
FS		 70#include "seccomp-util.h"
71#endif
b6e66135 72#include "selinux-setup.h"
3dfc9763
LP		 73#include "selinux-util.h"
74#include "signal-util.h"
ffbd2c4d 75#include "smack-setup.h"
3dfc9763 76#include "special.h"
8fcde012 77#include "stat-util.h"
15a5e950 78#include "stdio-util.h"
3dfc9763
LP		 79#include "strv.h"
80#include "switch-root.h"
a8b627aa 81#include "sysctl-util.h"
3dfc9763 82#include "terminal-util.h"
8612da97 83#include "umask-util.h"
b1d4f8e1 84#include "user-util.h"
9ce17593 85#include "util.h"
3dfc9763
LP		 86#include "virt.h"
87#include "watchdog.h"
b6e66135 88
7e11a95e
EV		 89#if HAS_FEATURE_ADDRESS_SANITIZER
90#include <sanitizer/lsan_interface.h>
91#endif
92
3a0f06c4
ZJS		 93#define DEFAULT_TASKS_MAX ((TasksMax) { 15U, 100U }) /* 15% */
94
f170852a
LP		 95static enum {
96 ACTION_RUN,
e965d56d 97 ACTION_HELP,
9ba0bc4e 98 ACTION_VERSION,
e537352b 99 ACTION_TEST,
bbc1acab
YW		 100 ACTION_DUMP_CONFIGURATION_ITEMS,
101 ACTION_DUMP_BUS_PROPERTIES,
5c08257b 102 ACTION_BUS_INTROSPECT,
fa0f4d8a 103} arg_action = ACTION_RUN;
fb39af4c 104
5c08257b
ZJS		 105static const char *arg_bus_introspect = NULL;
106
45250e66
LP		 107/* Those variables are initialized to 0 automatically, so we avoid uninitialized memory access. Real
108 * defaults are assigned in reset_arguments() below. */
fb39af4c
ZJS		 109static char *arg_default_unit;
110static bool arg_system;
111static bool arg_dump_core;
112static int arg_crash_chvt;
113static bool arg_crash_shell;
114static bool arg_crash_reboot;
115static char *arg_confirm_spawn;
116static ShowStatus arg_show_status;
36cf4507 117static StatusUnitFormat arg_status_unit_format;
fb39af4c
ZJS		 118static bool arg_switched_root;
119static PagerFlags arg_pager_flags;
120static bool arg_service_watchdogs;
121static ExecOutput arg_default_std_output;
122static ExecOutput arg_default_std_error;
123static usec_t arg_default_restart_usec;
124static usec_t arg_default_timeout_start_usec;
125static usec_t arg_default_timeout_stop_usec;
126static usec_t arg_default_timeout_abort_usec;
127static bool arg_default_timeout_abort_set;
128static usec_t arg_default_start_limit_interval;
129static unsigned arg_default_start_limit_burst;
130static usec_t arg_runtime_watchdog;
65224c1d 131static usec_t arg_reboot_watchdog;
acafd7d8 132static usec_t arg_kexec_watchdog;
fb39af4c
ZJS		 133static char *arg_early_core_pattern;
134static char *arg_watchdog_device;
135static char **arg_default_environment;
136static struct rlimit *arg_default_rlimit[_RLIMIT_MAX];
137static uint64_t arg_capability_bounding_set;
138static bool arg_no_new_privs;
139static nsec_t arg_timer_slack_nsec;
140static usec_t arg_default_timer_accuracy_usec;
141static Set* arg_syscall_archs;
142static FILE* arg_serialization;
143static int arg_default_cpu_accounting;
144static bool arg_default_io_accounting;
145static bool arg_default_ip_accounting;
146static bool arg_default_blockio_accounting;
147static bool arg_default_memory_accounting;
148static bool arg_default_tasks_accounting;
3a0f06c4 149static TasksMax arg_default_tasks_max;
fb39af4c
ZJS		 150static sd_id128_t arg_machine_id;
151static EmergencyAction arg_cad_burst_action;
152static OOMPolicy arg_default_oom_policy;
153static CPUSet arg_cpu_affinity;
b070c7c0 154static NUMAPolicy arg_numa_policy;
3753325b 155static usec_t arg_clock_usec;
d247f232
LP		 156static void *arg_random_seed;
157static size_t arg_random_seed_size;
61fbbac1 158
0e06a031
LP		 159/* A copy of the original environment block */
160static char **saved_env = NULL;
161
a9fd4cd1
FB		 162static int parse_configuration(const struct rlimit *saved_rlimit_nofile,
163 const struct rlimit *saved_rlimit_memlock);
4fc935ca 164
bb259772
LP		 165_noreturn_ static void freeze_or_exit_or_reboot(void) {
166
c3b6a348
LP		 167 /* If we are running in a container, let's prefer exiting, after all we can propagate an exit code to
168 * the container manager, and thus inform it that something went wrong. */
bb259772
LP		 169 if (detect_container() > 0) {
170 log_emergency("Exiting PID 1...");
c3b6a348 171 _exit(EXIT_EXCEPTION);
bb259772 172 }
b9e74c39
LP		 173
174 if (arg_crash_reboot) {
175 log_notice("Rebooting in 10s...");
176 (void) sleep(10);
177
178 log_notice("Rebooting now...");
179 (void) reboot(RB_AUTOBOOT);
180 log_emergency_errno(errno, "Failed to reboot: %m");
181 }
182
183 log_emergency("Freezing execution.");
184 freeze();
185}
186
848e863a 187_noreturn_ static void crash(int sig) {
7d06dad9
MS		 188 struct sigaction sa;
189 pid_t pid;
97c4f35c 190
df0ff127 191 if (getpid_cached() != 1)
abb26902 192 /* Pass this on immediately, if this is not PID 1 */
92ca4cac 193 (void) raise(sig);
abb26902 194 else if (!arg_dump_core)
4104970e 195 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));
97c4f35c 196 else {
7d06dad9 197 sa = (struct sigaction) {
189d5bac 198 .sa_handler = nop_signal_handler,
b92bea5d
ZJS		 199 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
200 };
97c4f35c 201
6f5e3f35 202 /* We want to wait for the core process, hence let's enable SIGCHLD */
92ca4cac 203 (void) sigaction(SIGCHLD, &sa, NULL);
6f5e3f35 204
8869a0b4 205 pid = raw_clone(SIGCHLD);
e62d8c39 206 if (pid < 0)
56f64d95 207 log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
97c4f35c 208 else if (pid == 0) {
97c4f35c 209 /* Enable default signal handler for core dump */
15a90032 210
92ca4cac
LP		 211 sa = (struct sigaction) {
212 .sa_handler = SIG_DFL,
213 };
214 (void) sigaction(sig, &sa, NULL);
97c4f35c 215
15a90032
LP		 216 /* Don't limit the coredump size */
217 (void) setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY));
97c4f35c
LP		 218
219 /* Just to be sure... */
e62d9b81 220 (void) chdir("/");
97c4f35c
LP		 221
222 /* Raise the signal again */
ee05e779 223 pid = raw_getpid();
92ca4cac 224 (void) kill(pid, sig); /* raise() would kill the parent */
97c4f35c
LP		 225
226 assert_not_reached("We shouldn't be here...");
bb85a582 227 _exit(EXIT_EXCEPTION);
4fc935ca 228 } else {
8e12a6ae
LP		 229 siginfo_t status;
230 int r;
4fc935ca
LP		 231
232 /* Order things nicely. */
e62d8c39
ZJS		 233 r = wait_for_terminate(pid, &status);
234 if (r < 0)
da927ba9 235 log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig));
e1714f02
ZJS		 236 else if (status.si_code != CLD_DUMPED) {
237 const char *s = status.si_code == CLD_EXITED
e04ed6db 238 ? exit_status_to_string(status.si_status, EXIT_STATUS_LIBC)
e1714f02
ZJS		 239 : signal_to_string(status.si_status);
240
ee05e779
ZJS		 241 log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).",
242 signal_to_string(sig),
e1714f02
ZJS		 243 pid,
244 sigchld_code_to_string(status.si_code),
245 status.si_status, strna(s));
246 } else
247 log_emergency("Caught <%s>, dumped core as pid "PID_FMT".",
248 signal_to_string(sig), pid);
97c4f35c
LP		 249 }
250 }
251
b9e74c39 252 if (arg_crash_chvt >= 0)
92ca4cac 253 (void) chvt(arg_crash_chvt);
601f6a1e 254
7d06dad9
MS		 255 sa = (struct sigaction) {
256 .sa_handler = SIG_IGN,
257 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
258 };
259
260 /* Let the kernel reap children for us */
261 (void) sigaction(SIGCHLD, &sa, NULL);
8c43883a 262
7d06dad9 263 if (arg_crash_shell) {
b9e74c39 264 log_notice("Executing crash shell in 10s...");
92ca4cac 265 (void) sleep(10);
4fc935ca 266
8869a0b4 267 pid = raw_clone(SIGCHLD);
cd3bd60a 268 if (pid < 0)
56f64d95 269 log_emergency_errno(errno, "Failed to fork off crash shell: %m");
6f5e3f35 270 else if (pid == 0) {
b9e74c39 271 (void) setsid();
92ca4cac 272 (void) make_console_stdio();
595225af 273 (void) rlimit_nofile_safe();
92ca4cac 274 (void) execle("/bin/sh", "/bin/sh", NULL, environ);
6f5e3f35 275
ee05e779 276 log_emergency_errno(errno, "execle() failed: %m");
bb85a582 277 _exit(EXIT_EXCEPTION);
b9e74c39
LP		 278 } else {
279 log_info("Spawned crash shell as PID "PID_FMT".", pid);
4cf0b03b 280 (void) wait_for_terminate(pid, NULL);
b9e74c39 281 }
4fc935ca
LP		 282 }
283
bb259772 284 freeze_or_exit_or_reboot();
97c4f35c
LP		 285}
286
287static void install_crash_handler(void) {
297d563d 288 static const struct sigaction sa = {
b92bea5d 289 .sa_handler = crash,
297d563d 290 .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */
b92bea5d 291 };
297d563d 292 int r;
97c4f35c 293
297d563d
LP		 294 /* We ignore the return value here, since, we don't mind if we
295 * cannot set up a crash handler */
296 r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
297 if (r < 0)
298 log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m");
97c4f35c 299}
f170852a 300
56d96fc0
LP		 301static int console_setup(void) {
302 _cleanup_close_ int tty_fd = -1;
303 int r;
80876c20 304
512947d4 305 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
23bbb0de
MS		 306 if (tty_fd < 0)
307 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
80876c20 308
56d96fc0
LP		 309 /* We don't want to force text mode. plymouth may be showing
310 * pictures already from initrd. */
512947d4 311 r = reset_terminal_fd(tty_fd, false);
23bbb0de
MS		 312 if (r < 0)
313 return log_error_errno(r, "Failed to reset /dev/console: %m");
843d2643 314
56d96fc0 315 return 0;
80876c20
LP		 316}
317
ee48dbd5 318static int set_machine_id(const char *m) {
e042eab7 319 sd_id128_t t;
8b26cdbd 320 assert(m);
ee48dbd5 321
e042eab7 322 if (sd_id128_from_string(m, &t) < 0)
ee48dbd5
NC		 323 return -EINVAL;
324
e042eab7 325 if (sd_id128_is_null(t))
ee48dbd5
NC		 326 return -EINVAL;
327
e042eab7 328 arg_machine_id = t;
ee48dbd5
NC		 329 return 0;
330}
331
96287a49 332static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
059cb385 333 int r;
f170852a 334
059cb385 335 assert(key);
5192bd19 336
1d84ad94 337 if (STR_IN_SET(key, "systemd.unit", "rd.systemd.unit")) {
bf4df7c3 338
1d84ad94
LP		 339 if (proc_cmdline_value_missing(key, value))
340 return 0;
bf4df7c3 341
1d84ad94
LP		 342 if (!unit_name_is_valid(value, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
343 log_warning("Unit name specified on %s= is not valid, ignoring: %s", key, value);
cd57038a
ZJS		 344 else if (in_initrd() == !!startswith(key, "rd."))
345 return free_and_strdup_warn(&arg_default_unit, value);
f170852a 346
1d84ad94 347 } else if (proc_cmdline_key_streq(key, "systemd.dump_core")) {
4fc935ca 348
1d84ad94 349 r = value ? parse_boolean(value) : true;
fb472900 350 if (r < 0)
5e1ee764 351 log_warning_errno(r, "Failed to parse dump core switch %s, ignoring: %m", value);
4fc935ca 352 else
fa0f4d8a 353 arg_dump_core = r;
4fc935ca 354
c6885f5f
FB		 355 } else if (proc_cmdline_key_streq(key, "systemd.early_core_pattern")) {
356
357 if (proc_cmdline_value_missing(key, value))
358 return 0;
359
360 if (path_is_absolute(value))
361 (void) parse_path_argument_and_warn(value, false, &arg_early_core_pattern);
362 else
363 log_warning("Specified core pattern '%s' is not an absolute path, ignoring.", value);
364
1d84ad94 365 } else if (proc_cmdline_key_streq(key, "systemd.crash_chvt")) {
b9e74c39 366
1d84ad94
LP		 367 if (!value)
368 arg_crash_chvt = 0; /* turn on */
5e1ee764 369 else {
a07a7324 370 r = parse_crash_chvt(value, &arg_crash_chvt);
5e1ee764
YW		 371 if (r < 0)
372 log_warning_errno(r, "Failed to parse crash chvt switch %s, ignoring: %m", value);
373 }
b9e74c39 374
1d84ad94 375 } else if (proc_cmdline_key_streq(key, "systemd.crash_shell")) {
4fc935ca 376
1d84ad94 377 r = value ? parse_boolean(value) : true;
fb472900 378 if (r < 0)
5e1ee764 379 log_warning_errno(r, "Failed to parse crash shell switch %s, ignoring: %m", value);
4fc935ca 380 else
fa0f4d8a 381 arg_crash_shell = r;
5e7ee61c 382
1d84ad94 383 } else if (proc_cmdline_key_streq(key, "systemd.crash_reboot")) {
5e7ee61c 384
1d84ad94 385 r = value ? parse_boolean(value) : true;
b9e74c39 386 if (r < 0)
5e1ee764 387 log_warning_errno(r, "Failed to parse crash reboot switch %s, ignoring: %m", value);
5e7ee61c 388 else
b9e74c39 389 arg_crash_reboot = r;
5e7ee61c 390
1d84ad94
LP		 391 } else if (proc_cmdline_key_streq(key, "systemd.confirm_spawn")) {
392 char *s;
7d5ceb64 393
1d84ad94 394 r = parse_confirm_spawn(value, &s);
059cb385 395 if (r < 0)
5e1ee764
YW		 396 log_warning_errno(r, "Failed to parse confirm_spawn switch %s, ignoring: %m", value);
397 else
398 free_and_replace(arg_confirm_spawn, s);
601f6a1e 399
2a12e32e
JK		 400 } else if (proc_cmdline_key_streq(key, "systemd.service_watchdogs")) {
401
402 r = value ? parse_boolean(value) : true;
403 if (r < 0)
5e1ee764 404 log_warning_errno(r, "Failed to parse service watchdog switch %s, ignoring: %m", value);
2a12e32e
JK		 405 else
406 arg_service_watchdogs = r;
407
1d84ad94 408 } else if (proc_cmdline_key_streq(key, "systemd.show_status")) {
9e58ff9c 409
1d84ad94
LP		 410 if (value) {
411 r = parse_show_status(value, &arg_show_status);
412 if (r < 0)
5e1ee764 413 log_warning_errno(r, "Failed to parse show status switch %s, ignoring: %m", value);
1d84ad94
LP		 414 } else
415 arg_show_status = SHOW_STATUS_YES;
059cb385 416
36cf4507
ZJS		 417 } else if (proc_cmdline_key_streq(key, "systemd.status_unit_format")) {
418
419 if (proc_cmdline_value_missing(key, value))
420 return 0;
421
422 r = status_unit_format_from_string(value);
423 if (r < 0)
424 log_warning_errno(r, "Failed to parse %s=%s, ignoring: %m", key, value);
425 else
426 arg_status_unit_format = r;
427
1d84ad94
LP		 428 } else if (proc_cmdline_key_streq(key, "systemd.default_standard_output")) {
429
430 if (proc_cmdline_value_missing(key, value))
431 return 0;
0a494f1f 432
059cb385 433 r = exec_output_from_string(value);
fb472900 434 if (r < 0)
5e1ee764 435 log_warning_errno(r, "Failed to parse default standard output switch %s, ignoring: %m", value);
0a494f1f
LP		 436 else
437 arg_default_std_output = r;
0a494f1f 438
1d84ad94
LP		 439 } else if (proc_cmdline_key_streq(key, "systemd.default_standard_error")) {
440
441 if (proc_cmdline_value_missing(key, value))
442 return 0;
059cb385
LP		 443
444 r = exec_output_from_string(value);
fb472900 445 if (r < 0)
5e1ee764 446 log_warning_errno(r, "Failed to parse default standard error switch %s, ignoring: %m", value);
0a494f1f
LP		 447 else
448 arg_default_std_error = r;
9e7c5357 449
1d84ad94
LP		 450 } else if (streq(key, "systemd.setenv")) {
451
452 if (proc_cmdline_value_missing(key, value))
453 return 0;
059cb385
LP		 454
455 if (env_assignment_is_valid(value)) {
e21fea24
KS		 456 char **env;
457
059cb385 458 env = strv_env_set(arg_default_environment, value);
1d84ad94
LP		 459 if (!env)
460 return log_oom();
461
462 arg_default_environment = env;
e21fea24 463 } else
059cb385 464 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
9e58ff9c 465
1d84ad94
LP		 466 } else if (proc_cmdline_key_streq(key, "systemd.machine_id")) {
467
468 if (proc_cmdline_value_missing(key, value))
469 return 0;
470
471 r = set_machine_id(value);
472 if (r < 0)
5e1ee764 473 log_warning_errno(r, "MachineID '%s' is not valid, ignoring: %m", value);
ee48dbd5 474
1d84ad94
LP		 475 } else if (proc_cmdline_key_streq(key, "systemd.default_timeout_start_sec")) {
476
477 if (proc_cmdline_value_missing(key, value))
478 return 0;
479
480 r = parse_sec(value, &arg_default_timeout_start_usec);
481 if (r < 0)
5e1ee764 482 log_warning_errno(r, "Failed to parse default start timeout '%s', ignoring: %m", value);
1d84ad94
LP		 483
484 if (arg_default_timeout_start_usec <= 0)
485 arg_default_timeout_start_usec = USEC_INFINITY;
ee48dbd5 486
68d58f38
LP		 487 } else if (proc_cmdline_key_streq(key, "systemd.cpu_affinity")) {
488
489 if (proc_cmdline_value_missing(key, value))
490 return 0;
491
492 r = parse_cpu_set(value, &arg_cpu_affinity);
493 if (r < 0)
162392b7 494 log_warning_errno(r, "Failed to parse CPU affinity mask '%s', ignoring: %m", value);
68d58f38 495
8a2c1fbf
EJ		 496 } else if (proc_cmdline_key_streq(key, "systemd.watchdog_device")) {
497
498 if (proc_cmdline_value_missing(key, value))
499 return 0;
500
c6885f5f 501 (void) parse_path_argument_and_warn(value, false, &arg_watchdog_device);
8a2c1fbf 502
3753325b
LP		 503 } else if (proc_cmdline_key_streq(key, "systemd.clock_usec")) {
504
505 if (proc_cmdline_value_missing(key, value))
506 return 0;
507
508 r = safe_atou64(value, &arg_clock_usec);
509 if (r < 0)
510 log_warning_errno(r, "Failed to parse systemd.clock_usec= argument, ignoring: %s", value);
511
d247f232
LP		 512 } else if (proc_cmdline_key_streq(key, "systemd.random_seed")) {
513 void *p;
514 size_t sz;
515
516 if (proc_cmdline_value_missing(key, value))
517 return 0;
518
519 r = unbase64mem(value, (size_t) -1, &p, &sz);
520 if (r < 0)
521 log_warning_errno(r, "Failed to parse systemd.random_seed= argument, ignoring: %s", value);
522
523 free(arg_random_seed);
524 arg_random_seed = sz > 0 ? p : mfree(p);
525 arg_random_seed_size = sz;
526
059cb385 527 } else if (streq(key, "quiet") && !value) {
d7b15e0a 528
7a293242 529 if (arg_show_status == _SHOW_STATUS_INVALID)
0d066dd1 530 arg_show_status = SHOW_STATUS_ERROR;
059cb385
LP		 531
532 } else if (streq(key, "debug") && !value) {
d7b15e0a 533
1de1c9c3
LP		 534 /* Note that log_parse_environment() handles 'debug'
535 * too, and sets the log level to LOG_DEBUG. */
d7b15e0a 536
75f86906 537 if (detect_container() > 0)
b2103dcc 538 log_set_target(LOG_TARGET_CONSOLE);
059cb385 539
dcd61450 540 } else if (!value) {
e2c9a131 541 const char *target;
f170852a 542
ceae6295 543 /* Compatible with SysV, but supported independently even if SysV compatibility is disabled. */
e2c9a131
EV		 544 target = runlevel_to_target(key);
545 if (target)
cd57038a 546 return free_and_strdup_warn(&arg_default_unit, target);
f170852a
LP		 547 }
548
549 return 0;
550}
551
e8e581bf
ZJS		 552#define DEFINE_SETTER(name, func, descr) \
553 static int name(const char *unit, \
554 const char *filename, \
555 unsigned line, \
556 const char *section, \
71a61510 557 unsigned section_line, \
e8e581bf
ZJS		 558 const char *lvalue, \
559 int ltype, \
560 const char *rvalue, \
561 void *data, \
562 void *userdata) { \
563 \
564 int r; \
565 \
566 assert(filename); \
567 assert(lvalue); \
568 assert(rvalue); \
569 \
570 r = func(rvalue); \
571 if (r < 0) \
d1cefe0a
LP		 572 log_syntax(unit, LOG_ERR, filename, line, r, \
573 "Invalid " descr "'%s': %m", \
574 rvalue); \
e8e581bf
ZJS		 575 \
576 return 0; \
577 }
487393e9 578
a6ecbf83
FB		 579DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level");
580DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target");
c5673ed0 581DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color");
a6ecbf83 582DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location");
c5673ed0 583DEFINE_SETTER(config_parse_time, log_show_time_from_string, "time");
487393e9 584
a61d6874
ZJS		 585static int config_parse_default_timeout_abort(
586 const char *unit,
587 const char *filename,
588 unsigned line,
589 const char *section,
590 unsigned section_line,
591 const char *lvalue,
592 int ltype,
593 const char *rvalue,
594 void *data,
595 void *userdata) {
596 int r;
597
598 r = config_parse_timeout_abort(unit, filename, line, section, section_line, lvalue, ltype, rvalue,
599 &arg_default_timeout_abort_usec, userdata);
600 if (r >= 0)
601 arg_default_timeout_abort_set = r;
602 return 0;
603}
487393e9 604
a61d6874 605static int parse_config_file(void) {
f975e971 606 const ConfigTableItem items[] = {
a61d6874
ZJS		 607 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
608 { "Manager", "LogTarget", config_parse_target, 0, NULL },
609 { "Manager", "LogColor", config_parse_color, 0, NULL },
610 { "Manager", "LogLocation", config_parse_location, 0, NULL },
c5673ed0 611 { "Manager", "LogTime", config_parse_time, 0, NULL },
a61d6874
ZJS		 612 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
613 { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt, 0, &arg_crash_chvt },
614 { "Manager", "CrashChangeVT", config_parse_crash_chvt, 0, &arg_crash_chvt },
615 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
616 { "Manager", "CrashReboot", config_parse_bool, 0, &arg_crash_reboot },
617 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
618 { "Manager", "StatusUnitFormat", config_parse_status_unit_format, 0, &arg_status_unit_format },
619 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, &arg_cpu_affinity },
620 { "Manager", "NUMAPolicy", config_parse_numa_policy, 0, &arg_numa_policy.type },
621 { "Manager", "NUMAMask", config_parse_numa_mask, 0, &arg_numa_policy },
622 { "Manager", "JoinControllers", config_parse_warn_compat, DISABLED_CONFIGURATION, NULL },
623 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
624 { "Manager", "RebootWatchdogSec", config_parse_sec, 0, &arg_reboot_watchdog },
625 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_reboot_watchdog }, /* obsolete alias */
626 { "Manager", "KExecWatchdogSec", config_parse_sec, 0, &arg_kexec_watchdog },
627 { "Manager", "WatchdogDevice", config_parse_path, 0, &arg_watchdog_device },
628 { "Manager", "CapabilityBoundingSet", config_parse_capability_set, 0, &arg_capability_bounding_set },
629 { "Manager", "NoNewPrivileges", config_parse_bool, 0, &arg_no_new_privs },
349cc4a5 630#if HAVE_SECCOMP
a61d6874 631 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
89fffa27 632#endif
a61d6874
ZJS		 633 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
634 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
635 { "Manager", "DefaultStandardOutput", config_parse_output_restricted, 0, &arg_default_std_output },
636 { "Manager", "DefaultStandardError", config_parse_output_restricted, 0, &arg_default_std_error },
637 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
638 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
639 { "Manager", "DefaultTimeoutAbortSec", config_parse_default_timeout_abort, 0, NULL },
640 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
641 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval }, /* obsolete alias */
642 { "Manager", "DefaultStartLimitIntervalSec", config_parse_sec, 0, &arg_default_start_limit_interval },
643 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
644 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
645 { "Manager", "DefaultLimitCPU", config_parse_rlimit, RLIMIT_CPU, arg_default_rlimit },
646 { "Manager", "DefaultLimitFSIZE", config_parse_rlimit, RLIMIT_FSIZE, arg_default_rlimit },
647 { "Manager", "DefaultLimitDATA", config_parse_rlimit, RLIMIT_DATA, arg_default_rlimit },
648 { "Manager", "DefaultLimitSTACK", config_parse_rlimit, RLIMIT_STACK, arg_default_rlimit },
649 { "Manager", "DefaultLimitCORE", config_parse_rlimit, RLIMIT_CORE, arg_default_rlimit },
650 { "Manager", "DefaultLimitRSS", config_parse_rlimit, RLIMIT_RSS, arg_default_rlimit },
651 { "Manager", "DefaultLimitNOFILE", config_parse_rlimit, RLIMIT_NOFILE, arg_default_rlimit },
652 { "Manager", "DefaultLimitAS", config_parse_rlimit, RLIMIT_AS, arg_default_rlimit },
653 { "Manager", "DefaultLimitNPROC", config_parse_rlimit, RLIMIT_NPROC, arg_default_rlimit },
654 { "Manager", "DefaultLimitMEMLOCK", config_parse_rlimit, RLIMIT_MEMLOCK, arg_default_rlimit },
655 { "Manager", "DefaultLimitLOCKS", config_parse_rlimit, RLIMIT_LOCKS, arg_default_rlimit },
656 { "Manager", "DefaultLimitSIGPENDING", config_parse_rlimit, RLIMIT_SIGPENDING, arg_default_rlimit },
657 { "Manager", "DefaultLimitMSGQUEUE", config_parse_rlimit, RLIMIT_MSGQUEUE, arg_default_rlimit },
658 { "Manager", "DefaultLimitNICE", config_parse_rlimit, RLIMIT_NICE, arg_default_rlimit },
659 { "Manager", "DefaultLimitRTPRIO", config_parse_rlimit, RLIMIT_RTPRIO, arg_default_rlimit },
660 { "Manager", "DefaultLimitRTTIME", config_parse_rlimit, RLIMIT_RTTIME, arg_default_rlimit },
661 { "Manager", "DefaultCPUAccounting", config_parse_tristate, 0, &arg_default_cpu_accounting },
662 { "Manager", "DefaultIOAccounting", config_parse_bool, 0, &arg_default_io_accounting },
663 { "Manager", "DefaultIPAccounting", config_parse_bool, 0, &arg_default_ip_accounting },
664 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
665 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
666 { "Manager", "DefaultTasksAccounting", config_parse_bool, 0, &arg_default_tasks_accounting },
667 { "Manager", "DefaultTasksMax", config_parse_tasks_max, 0, &arg_default_tasks_max },
668 { "Manager", "CtrlAltDelBurstAction", config_parse_emergency_action, 0, &arg_cad_burst_action },
669 { "Manager", "DefaultOOMPolicy", config_parse_oom_policy, 0, &arg_default_oom_policy },
d3b1c508 670 {}
487393e9
LP		 671 };
672
1b907b5c 673 const char *fn, *conf_dirs_nulstr;
487393e9 674
463d0d15 675 fn = arg_system ?
75eb6154
LP		 676 PKGSYSCONFDIR "/system.conf" :
677 PKGSYSCONFDIR "/user.conf";
678
463d0d15 679 conf_dirs_nulstr = arg_system ?
75eb6154
LP		 680 CONF_PATHS_NULSTR("systemd/system.conf.d") :
681 CONF_PATHS_NULSTR("systemd/user.conf.d");
682
4f9ff96a
LP		 683 (void) config_parse_many_nulstr(
684 fn, conf_dirs_nulstr,
685 "Manager\0",
686 config_item_table_lookup, items,
687 CONFIG_PARSE_WARN,
688 NULL,
689 NULL);
36c16a7c
LP		 690
691 /* Traditionally "0" was used to turn off the default unit timeouts. Fix this up so that we used USEC_INFINITY
692 * like everywhere else. */
693 if (arg_default_timeout_start_usec <= 0)
694 arg_default_timeout_start_usec = USEC_INFINITY;
695 if (arg_default_timeout_stop_usec <= 0)
696 arg_default_timeout_stop_usec = USEC_INFINITY;
487393e9 697
487393e9
LP		 698 return 0;
699}
700
85cb4151 701static void set_manager_defaults(Manager *m) {
06af2a04
TB		 702
703 assert(m);
704
5b65ae15
LP		 705 /* Propagates the various default unit property settings into the manager object, i.e. properties that do not
706 * affect the manager itself, but are just what newly allocated units will have set if they haven't set
707 * anything else. (Also see set_manager_settings() for the settings that affect the manager's own behaviour) */
708
06af2a04
TB		 709 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
710 m->default_std_output = arg_default_std_output;
711 m->default_std_error = arg_default_std_error;
712 m->default_timeout_start_usec = arg_default_timeout_start_usec;
713 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
dc653bf4
JK		 714 m->default_timeout_abort_usec = arg_default_timeout_abort_usec;
715 m->default_timeout_abort_set = arg_default_timeout_abort_set;
06af2a04
TB		 716 m->default_restart_usec = arg_default_restart_usec;
717 m->default_start_limit_interval = arg_default_start_limit_interval;
718 m->default_start_limit_burst = arg_default_start_limit_burst;
a88c5b8a
CD		 719
720 /* On 4.15+ with unified hierarchy, CPU accounting is essentially free as it doesn't require the CPU
721 * controller to be enabled, so the default is to enable it unless we got told otherwise. */
722 if (arg_default_cpu_accounting >= 0)
723 m->default_cpu_accounting = arg_default_cpu_accounting;
724 else
725 m->default_cpu_accounting = cpu_accounting_is_cheap();
726
13c31542 727 m->default_io_accounting = arg_default_io_accounting;
377bfd2d 728 m->default_ip_accounting = arg_default_ip_accounting;
06af2a04
TB		 729 m->default_blockio_accounting = arg_default_blockio_accounting;
730 m->default_memory_accounting = arg_default_memory_accounting;
03a7b521 731 m->default_tasks_accounting = arg_default_tasks_accounting;
0af20ea2 732 m->default_tasks_max = arg_default_tasks_max;
afcfaa69 733 m->default_oom_policy = arg_default_oom_policy;
06af2a04 734
79a224c4
LP		 735 (void) manager_set_default_rlimits(m, arg_default_rlimit);
736
737 (void) manager_default_environment(m);
738 (void) manager_transient_environment_add(m, arg_default_environment);
06af2a04
TB		 739}
740
7b46fc6a
LP		 741static void set_manager_settings(Manager *m) {
742
743 assert(m);
744
986935cf
FB		 745 /* Propagates the various manager settings into the manager object, i.e. properties that
746 * effect the manager itself (as opposed to just being inherited into newly allocated
747 * units, see set_manager_defaults() above). */
5b65ae15 748
7b46fc6a 749 m->confirm_spawn = arg_confirm_spawn;
2a12e32e 750 m->service_watchdogs = arg_service_watchdogs;
7b46fc6a
LP		 751 m->cad_burst_action = arg_cad_burst_action;
752
986935cf
FB		 753 manager_set_watchdog(m, WATCHDOG_RUNTIME, arg_runtime_watchdog);
754 manager_set_watchdog(m, WATCHDOG_REBOOT, arg_reboot_watchdog);
755 manager_set_watchdog(m, WATCHDOG_KEXEC, arg_kexec_watchdog);
756
7365a296 757 manager_set_show_status(m, arg_show_status, "commandline");
36cf4507 758 m->status_unit_format = arg_status_unit_format;
7b46fc6a
LP		 759}
760
f170852a 761static int parse_argv(int argc, char *argv[]) {
f170852a
LP		 762 enum {
763 ARG_LOG_LEVEL = 0x100,
764 ARG_LOG_TARGET,
bbe63281
LP		 765 ARG_LOG_COLOR,
766 ARG_LOG_LOCATION,
c5673ed0 767 ARG_LOG_TIME,
2f198e2f 768 ARG_UNIT,
edb9aaa8 769 ARG_SYSTEM,
af2d49f7 770 ARG_USER,
e537352b 771 ARG_TEST,
b87c2aa6 772 ARG_NO_PAGER,
9ba0bc4e 773 ARG_VERSION,
80876c20 774 ARG_DUMP_CONFIGURATION_ITEMS,
bbc1acab 775 ARG_DUMP_BUS_PROPERTIES,
5c08257b 776 ARG_BUS_INTROSPECT,
9e58ff9c 777 ARG_DUMP_CORE,
b9e74c39 778 ARG_CRASH_CHVT,
9e58ff9c 779 ARG_CRASH_SHELL,
b9e74c39 780 ARG_CRASH_REBOOT,
a16e1123 781 ARG_CONFIRM_SPAWN,
9e58ff9c 782 ARG_SHOW_STATUS,
4288f619 783 ARG_DESERIALIZE,
2660882b 784 ARG_SWITCHED_ROOT,
0a494f1f 785 ARG_DEFAULT_STD_OUTPUT,
ee48dbd5 786 ARG_DEFAULT_STD_ERROR,
2a12e32e
JK		 787 ARG_MACHINE_ID,
788 ARG_SERVICE_WATCHDOGS,
f170852a
LP		 789 };
790
791 static const struct option options[] = {
a16e1123
LP		 792 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
793 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
bbe63281
LP		 794 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
795 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
c5673ed0 796 { "log-time", optional_argument, NULL, ARG_LOG_TIME },
2f198e2f 797 { "unit", required_argument, NULL, ARG_UNIT },
edb9aaa8 798 { "system", no_argument, NULL, ARG_SYSTEM },
af2d49f7 799 { "user", no_argument, NULL, ARG_USER },
a16e1123 800 { "test", no_argument, NULL, ARG_TEST },
b87c2aa6 801 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
a16e1123 802 { "help", no_argument, NULL, 'h' },
9ba0bc4e 803 { "version", no_argument, NULL, ARG_VERSION },
a16e1123 804 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
bbc1acab 805 { "dump-bus-properties", no_argument, NULL, ARG_DUMP_BUS_PROPERTIES },
5c08257b 806 { "bus-introspect", required_argument, NULL, ARG_BUS_INTROSPECT },
a5d87bf0 807 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
b9e74c39 808 { "crash-chvt", required_argument, NULL, ARG_CRASH_CHVT },
a5d87bf0 809 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
b9e74c39 810 { "crash-reboot", optional_argument, NULL, ARG_CRASH_REBOOT },
a5d87bf0 811 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
6e98720f 812 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
a16e1123 813 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
2660882b 814 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
0a494f1f
LP		 815 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
816 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
ee48dbd5 817 { "machine-id", required_argument, NULL, ARG_MACHINE_ID },
2a12e32e 818 { "service-watchdogs", required_argument, NULL, ARG_SERVICE_WATCHDOGS },
fb472900 819 {}
f170852a
LP		 820 };
821
822 int c, r;
823
824 assert(argc >= 1);
825 assert(argv);
826
df0ff127 827 if (getpid_cached() == 1)
b770165a
LP		 828 opterr = 0;
829
099663ff 830 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
f170852a
LP		 831
832 switch (c) {
833
834 case ARG_LOG_LEVEL:
fb472900 835 r = log_set_max_level_from_string(optarg);
2b5107e1
ZJS		 836 if (r < 0)
837 return log_error_errno(r, "Failed to parse log level \"%s\": %m", optarg);
f170852a
LP		 838
839 break;
840
841 case ARG_LOG_TARGET:
fb472900 842 r = log_set_target_from_string(optarg);
2b5107e1
ZJS		 843 if (r < 0)
844 return log_error_errno(r, "Failed to parse log target \"%s\": %m", optarg);
f170852a
LP		 845
846 break;
847
bbe63281
LP		 848 case ARG_LOG_COLOR:
849
d0b170c8 850 if (optarg) {
fb472900 851 r = log_show_color_from_string(optarg);
2b5107e1
ZJS		 852 if (r < 0)
853 return log_error_errno(r, "Failed to parse log color setting \"%s\": %m",
854 optarg);
d0b170c8
LP		 855 } else
856 log_show_color(true);
bbe63281
LP		 857
858 break;
859
860 case ARG_LOG_LOCATION:
d0b170c8 861 if (optarg) {
fb472900 862 r = log_show_location_from_string(optarg);
2b5107e1
ZJS		 863 if (r < 0)
864 return log_error_errno(r, "Failed to parse log location setting \"%s\": %m",
865 optarg);
d0b170c8
LP		 866 } else
867 log_show_location(true);
bbe63281
LP		 868
869 break;
870
c5673ed0
DS		 871 case ARG_LOG_TIME:
872
873 if (optarg) {
874 r = log_show_time_from_string(optarg);
875 if (r < 0)
876 return log_error_errno(r, "Failed to parse log time setting \"%s\": %m",
877 optarg);
878 } else
879 log_show_time(true);
880
881 break;
882
0a494f1f 883 case ARG_DEFAULT_STD_OUTPUT:
fb472900 884 r = exec_output_from_string(optarg);
2b5107e1
ZJS		 885 if (r < 0)
886 return log_error_errno(r, "Failed to parse default standard output setting \"%s\": %m",
887 optarg);
888 arg_default_std_output = r;
0a494f1f
LP		 889 break;
890
891 case ARG_DEFAULT_STD_ERROR:
fb472900 892 r = exec_output_from_string(optarg);
2b5107e1
ZJS		 893 if (r < 0)
894 return log_error_errno(r, "Failed to parse default standard error output setting \"%s\": %m",
895 optarg);
896 arg_default_std_error = r;
0a494f1f
LP		 897 break;
898
2f198e2f 899 case ARG_UNIT:
e6e242ad 900 r = free_and_strdup(&arg_default_unit, optarg);
23bbb0de 901 if (r < 0)
2b5107e1 902 return log_error_errno(r, "Failed to set default unit \"%s\": %m", optarg);
f170852a
LP		 903
904 break;
905
edb9aaa8 906 case ARG_SYSTEM:
463d0d15 907 arg_system = true;
edb9aaa8 908 break;
a5dab5ce 909
af2d49f7 910 case ARG_USER:
463d0d15 911 arg_system = false;
a5dab5ce 912 break;
a5dab5ce 913
e965d56d 914 case ARG_TEST:
fa0f4d8a 915 arg_action = ACTION_TEST;
b87c2aa6
ZJS		 916 break;
917
918 case ARG_NO_PAGER:
0221d68a 919 arg_pager_flags |= PAGER_DISABLE;
e965d56d
LP		 920 break;
921
9ba0bc4e
ZJS		 922 case ARG_VERSION:
923 arg_action = ACTION_VERSION;
924 break;
925
e537352b 926 case ARG_DUMP_CONFIGURATION_ITEMS:
fa0f4d8a 927 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
e537352b
LP		 928 break;
929
bbc1acab
YW		 930 case ARG_DUMP_BUS_PROPERTIES:
931 arg_action = ACTION_DUMP_BUS_PROPERTIES;
932 break;
933
5c08257b
ZJS		 934 case ARG_BUS_INTROSPECT:
935 arg_bus_introspect = optarg;
936 arg_action = ACTION_BUS_INTROSPECT;
937 break;
938
9e58ff9c 939 case ARG_DUMP_CORE:
b9e74c39
LP		 940 if (!optarg)
941 arg_dump_core = true;
942 else {
943 r = parse_boolean(optarg);
944 if (r < 0)
2b5107e1
ZJS		 945 return log_error_errno(r, "Failed to parse dump core boolean: \"%s\": %m",
946 optarg);
b9e74c39 947 arg_dump_core = r;
a5d87bf0 948 }
b9e74c39
LP		 949 break;
950
951 case ARG_CRASH_CHVT:
a07a7324 952 r = parse_crash_chvt(optarg, &arg_crash_chvt);
b9e74c39 953 if (r < 0)
2b5107e1
ZJS		 954 return log_error_errno(r, "Failed to parse crash virtual terminal index: \"%s\": %m",
955 optarg);
9e58ff9c
LP		 956 break;
957
958 case ARG_CRASH_SHELL:
b9e74c39
LP		 959 if (!optarg)
960 arg_crash_shell = true;
961 else {
962 r = parse_boolean(optarg);
963 if (r < 0)
2b5107e1
ZJS		 964 return log_error_errno(r, "Failed to parse crash shell boolean: \"%s\": %m",
965 optarg);
b9e74c39
LP		 966 arg_crash_shell = r;
967 }
968 break;
969
970 case ARG_CRASH_REBOOT:
971 if (!optarg)
972 arg_crash_reboot = true;
973 else {
974 r = parse_boolean(optarg);
975 if (r < 0)
2b5107e1
ZJS		 976 return log_error_errno(r, "Failed to parse crash shell boolean: \"%s\": %m",
977 optarg);
b9e74c39 978 arg_crash_reboot = r;
a5d87bf0 979 }
9e58ff9c
LP		 980 break;
981
80876c20 982 case ARG_CONFIRM_SPAWN:
7d5ceb64
FB		 983 arg_confirm_spawn = mfree(arg_confirm_spawn);
984
985 r = parse_confirm_spawn(optarg, &arg_confirm_spawn);
986 if (r < 0)
2b5107e1
ZJS		 987 return log_error_errno(r, "Failed to parse confirm spawn option: \"%s\": %m",
988 optarg);
80876c20
LP		 989 break;
990
2a12e32e
JK		 991 case ARG_SERVICE_WATCHDOGS:
992 r = parse_boolean(optarg);
993 if (r < 0)
2b5107e1
ZJS		 994 return log_error_errno(r, "Failed to parse service watchdogs boolean: \"%s\": %m",
995 optarg);
2a12e32e
JK		 996 arg_service_watchdogs = r;
997 break;
998
9e58ff9c 999 case ARG_SHOW_STATUS:
d450b6f2
ZJS		 1000 if (optarg) {
1001 r = parse_show_status(optarg, &arg_show_status);
ac7ec288 1002 if (r < 0)
2b5107e1
ZJS		 1003 return log_error_errno(r, "Failed to parse show status boolean: \"%s\": %m",
1004 optarg);
d450b6f2
ZJS		 1005 } else
1006 arg_show_status = SHOW_STATUS_YES;
6e98720f 1007 break;
a5d87bf0 1008
a16e1123
LP		 1009 case ARG_DESERIALIZE: {
1010 int fd;
1011 FILE *f;
1012
01e10de3 1013 r = safe_atoi(optarg, &fd);
2b5107e1
ZJS		 1014 if (r < 0)
1015 log_error_errno(r, "Failed to parse deserialize option \"%s\": %m", optarg);
baaa35ad
ZJS		 1016 if (fd < 0)
1017 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1018 "Invalid deserialize fd: %d",
1019 fd);
a16e1123 1020
b9e74c39 1021 (void) fd_cloexec(fd, true);
01e10de3
LP		 1022
1023 f = fdopen(fd, "r");
4a62c710 1024 if (!f)
2b5107e1 1025 return log_error_errno(errno, "Failed to open serialization fd %d: %m", fd);
a16e1123 1026
74ca738f 1027 safe_fclose(arg_serialization);
d3b1c508 1028 arg_serialization = f;
a16e1123
LP		 1029
1030 break;
1031 }
1032
2660882b 1033 case ARG_SWITCHED_ROOT:
bf4df7c3 1034 arg_switched_root = true;
d03bc1b8
HH		 1035 break;
1036
ee48dbd5
NC		 1037 case ARG_MACHINE_ID:
1038 r = set_machine_id(optarg);
54500613 1039 if (r < 0)
2b5107e1 1040 return log_error_errno(r, "MachineID '%s' is not valid: %m", optarg);
ee48dbd5
NC		 1041 break;
1042
f170852a 1043 case 'h':
fa0f4d8a 1044 arg_action = ACTION_HELP;
f170852a
LP		 1045 break;
1046
1d2e23ab
LP		 1047 case 'D':
1048 log_set_max_level(LOG_DEBUG);
1049 break;
1050
099663ff
LP		 1051 case 'b':
1052 case 's':
1053 case 'z':
cd57038a
ZJS		 1054 /* Just to eat away the sysvinit kernel cmdline args that we'll parse in
1055 * parse_proc_cmdline_item() or ignore, without any getopt() error messages.
1056 */
099663ff 1057 case '?':
df0ff127 1058 if (getpid_cached() != 1)
099663ff 1059 return -EINVAL;
601185b4
ZJS		 1060 else
1061 return 0;
099663ff 1062
601185b4
ZJS		 1063 default:
1064 assert_not_reached("Unhandled option code.");
f170852a
LP		 1065 }
1066
d7a0f1f4 1067 if (optind < argc && getpid_cached() != 1)
d821e6d6
LP		 1068 /* Hmm, when we aren't run as init system
1069 * let's complain about excess arguments */
baaa35ad
ZJS		 1070 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1071 "Excess arguments.");
d821e6d6 1072
f170852a
LP		 1073 return 0;
1074}
1075
1076static int help(void) {
37ec0fdd
LP		 1077 _cleanup_free_ char *link = NULL;
1078 int r;
1079
1080 r = terminal_urlify_man("systemd", "1", &link);
1081 if (r < 0)
1082 return log_oom();
f170852a 1083
2e33c433 1084 printf("%s [OPTIONS...]\n\n"
7ae47326
ZJS		 1085 "%sStarts and monitors system and user services.%s\n\n"
1086 "This program takes no positional arguments.\n\n"
1087 "%sOptions%s:\n"
e537352b 1088 " -h --help Show this help\n"
cb4069d9 1089 " --version Show version\n"
cd69e88b
LP		 1090 " --test Determine initial transaction, dump it and exit\n"
1091 " --system In combination with --test: operate as system service manager\n"
1092 " --user In combination with --test: operate as per-user service manager\n"
b87c2aa6 1093 " --no-pager Do not pipe output into a pager\n"
80876c20 1094 " --dump-configuration-items Dump understood unit configuration items\n"
bbc1acab 1095 " --dump-bus-properties Dump exposed bus properties\n"
5c08257b 1096 " --bus-introspect=PATH Write XML introspection data\n"
9e58ff9c 1097 " --unit=UNIT Set default unit\n"
b9e74c39
LP		 1098 " --dump-core[=BOOL] Dump core on crash\n"
1099 " --crash-vt=NR Change to specified VT on crash\n"
1100 " --crash-reboot[=BOOL] Reboot on crash\n"
1101 " --crash-shell[=BOOL] Run shell on crash\n"
1102 " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n"
1103 " --show-status[=BOOL] Show status updates on the console during bootup\n"
c1dc6153 1104 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
9e58ff9c 1105 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
b9e74c39
LP		 1106 " --log-color[=BOOL] Highlight important log messages\n"
1107 " --log-location[=BOOL] Include code location in log messages\n"
c5673ed0 1108 " --log-time[=BOOL] Prefix log messages with current time\n"
0a494f1f 1109 " --default-standard-output= Set default standard output for services\n"
37ec0fdd
LP		 1110 " --default-standard-error= Set default standard error output for services\n"
1111 "\nSee the %s for details.\n"
1112 , program_invocation_short_name
7ae47326
ZJS		 1113 , ansi_highlight(), ansi_normal()
1114 , ansi_underline(), ansi_normal()
37ec0fdd
LP		 1115 , link
1116 );
f170852a
LP		 1117
1118 return 0;
1119}
1120
2cc856ac
LP		 1121static int prepare_reexecute(
1122 Manager *m,
1123 FILE **ret_f,
1124 FDSet **ret_fds,
1125 bool switching_root) {
1126
48b90859
LP		 1127 _cleanup_fdset_free_ FDSet *fds = NULL;
1128 _cleanup_fclose_ FILE *f = NULL;
a16e1123
LP		 1129 int r;
1130
1131 assert(m);
2cc856ac
LP		 1132 assert(ret_f);
1133 assert(ret_fds);
a16e1123 1134
6b78f9b4 1135 r = manager_open_serialization(m, &f);
48b90859
LP		 1136 if (r < 0)
1137 return log_error_errno(r, "Failed to create serialization file: %m");
a16e1123 1138
71445ae7 1139 /* Make sure nothing is really destructed when we shut down */
313cefa1 1140 m->n_reloading++;
718db961 1141 bus_manager_send_reloading(m, true);
71445ae7 1142
6b78f9b4 1143 fds = fdset_new();
48b90859
LP		 1144 if (!fds)
1145 return log_oom();
a16e1123 1146
b3680f49 1147 r = manager_serialize(m, f, fds, switching_root);
48b90859 1148 if (r < 0)
d68c645b 1149 return r;
a16e1123 1150
48b90859
LP		 1151 if (fseeko(f, 0, SEEK_SET) == (off_t) -1)
1152 return log_error_errno(errno, "Failed to rewind serialization fd: %m");
a16e1123 1153
6b78f9b4 1154 r = fd_cloexec(fileno(f), false);
48b90859
LP		 1155 if (r < 0)
1156 return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
a16e1123 1157
6b78f9b4 1158 r = fdset_cloexec(fds, false);
48b90859
LP		 1159 if (r < 0)
1160 return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
a16e1123 1161
2cc856ac
LP		 1162 *ret_f = TAKE_PTR(f);
1163 *ret_fds = TAKE_PTR(fds);
a16e1123 1164
48b90859 1165 return 0;
a16e1123
LP		 1166}
1167
a8b627aa
LP		 1168static void bump_file_max_and_nr_open(void) {
1169
1170 /* Let's bump fs.file-max and fs.nr_open to their respective maximums. On current kernels large numbers of file
1171 * descriptors are no longer a performance problem and their memory is properly tracked by memcg, thus counting
1172 * them and limiting them in another two layers of limits is unnecessary and just complicates things. This
1173 * function hence turns off 2 of the 4 levels of limits on file descriptors, and makes RLIMIT_NOLIMIT (soft +
1174 * hard) the only ones that really matter. */
1175
1176#if BUMP_PROC_SYS_FS_FILE_MAX || BUMP_PROC_SYS_FS_NR_OPEN
a8b627aa
LP		 1177 int r;
1178#endif
1179
1180#if BUMP_PROC_SYS_FS_FILE_MAX
6e2f7894
LP		 1181 /* The maximum the kernel allows for this since 5.2 is LONG_MAX, use that. (Previously thing where
1182 * different but the operation would fail silently.) */
56e8419a 1183 r = sysctl_writef("fs/file-max", "%li\n", LONG_MAX);
a8b627aa
LP		 1184 if (r < 0)
1185 log_full_errno(IN_SET(r, -EROFS, -EPERM, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, "Failed to bump fs.file-max, ignoring: %m");
1186#endif
1187
a8b627aa
LP		 1188#if BUMP_PROC_SYS_FS_NR_OPEN
1189 int v = INT_MAX;
1190
1191 /* Arg! The kernel enforces maximum and minimum values on the fs.nr_open, but we don't really know what they
1192 * are. The expression by which the maximum is determined is dependent on the architecture, and is something we
1193 * don't really want to copy to userspace, as it is dependent on implementation details of the kernel. Since
1194 * the kernel doesn't expose the maximum value to us, we can only try and hope. Hence, let's start with
1195 * INT_MAX, and then keep halving the value until we find one that works. Ugly? Yes, absolutely, but kernel
1196 * APIs are kernel APIs, so what do can we do... 🤯 */
1197
1198 for (;;) {
1199 int k;
1200
1201 v &= ~(__SIZEOF_POINTER__ - 1); /* Round down to next multiple of the pointer size */
1202 if (v < 1024) {
1203 log_warning("Can't bump fs.nr_open, value too small.");
1204 break;
1205 }
1206
1207 k = read_nr_open();
1208 if (k < 0) {
1209 log_error_errno(k, "Failed to read fs.nr_open: %m");
1210 break;
1211 }
1212 if (k >= v) { /* Already larger */
1213 log_debug("Skipping bump, value is already larger.");
1214 break;
1215 }
1216
56e8419a 1217 r = sysctl_writef("fs/nr_open", "%i\n", v);
a8b627aa
LP		 1218 if (r == -EINVAL) {
1219 log_debug("Couldn't write fs.nr_open as %i, halving it.", v);
1220 v /= 2;
1221 continue;
1222 }
1223 if (r < 0) {
1224 log_full_errno(IN_SET(r, -EROFS, -EPERM, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, "Failed to bump fs.nr_open, ignoring: %m");
1225 break;
1226 }
1227
1228 log_debug("Successfully bumped fs.nr_open to %i", v);
1229 break;
1230 }
1231#endif
1232}
1233
4096d6f5 1234static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
cda7faa9 1235 struct rlimit new_rlimit;
9264cc39 1236 int r, nr;
4096d6f5 1237
52d62075
LP		 1238 /* Get the underlying absolute limit the kernel enforces */
1239 nr = read_nr_open();
1240
cda7faa9
LP		 1241 /* Calculate the new limits to use for us. Never lower from what we inherited. */
1242 new_rlimit = (struct rlimit) {
1243 .rlim_cur = MAX((rlim_t) nr, saved_rlimit->rlim_cur),
1244 .rlim_max = MAX((rlim_t) nr, saved_rlimit->rlim_max),
1245 };
1246
1247 /* Shortcut if nothing changes. */
1248 if (saved_rlimit->rlim_max >= new_rlimit.rlim_max &&
1249 saved_rlimit->rlim_cur >= new_rlimit.rlim_cur) {
1250 log_debug("RLIMIT_NOFILE is already as high or higher than we need it, not bumping.");
1251 return 0;
1252 }
1253
52d62075
LP		 1254 /* Bump up the resource limit for ourselves substantially, all the way to the maximum the kernel allows, for
1255 * both hard and soft. */
cda7faa9 1256 r = setrlimit_closest(RLIMIT_NOFILE, &new_rlimit);
23bbb0de 1257 if (r < 0)
3ce40911 1258 return log_warning_errno(r, "Setting RLIMIT_NOFILE failed, ignoring: %m");
4096d6f5
LP		 1259
1260 return 0;
1261}
1262
fb3ae275 1263static int bump_rlimit_memlock(struct rlimit *saved_rlimit) {
cda7faa9 1264 struct rlimit new_rlimit;
04d1ee0f 1265 uint64_t mm;
fb3ae275
LP		 1266 int r;
1267
a17c1712 1268 /* BPF_MAP_TYPE_LPM_TRIE bpf maps are charged against RLIMIT_MEMLOCK, even if we have CAP_IPC_LOCK which should
6e3c443b 1269 * normally disable such checks. We need them to implement IPAddressAllow= and IPAddressDeny=, hence let's bump
a17c1712 1270 * the value high enough for our user. */
fb3ae275 1271
cda7faa9
LP		 1272 /* Using MAX() on resource limits only is safe if RLIM_INFINITY is > 0. POSIX declares that rlim_t
1273 * must be unsigned, hence this is a given, but let's make this clear here. */
1274 assert_cc(RLIM_INFINITY > 0);
1275
04d1ee0f 1276 mm = physical_memory() / 8; /* Let's scale how much we allow to be locked by the amount of physical
2d4f8cf4 1277 * RAM. We allow an eighth to be locked by us, just to pick a value. */
04d1ee0f 1278
cda7faa9 1279 new_rlimit = (struct rlimit) {
04d1ee0f
LP		 1280 .rlim_cur = MAX3(HIGH_RLIMIT_MEMLOCK, saved_rlimit->rlim_cur, mm),
1281 .rlim_max = MAX3(HIGH_RLIMIT_MEMLOCK, saved_rlimit->rlim_max, mm),
cda7faa9
LP		 1282 };
1283
1284 if (saved_rlimit->rlim_max >= new_rlimit.rlim_cur &&
1285 saved_rlimit->rlim_cur >= new_rlimit.rlim_max) {
1286 log_debug("RLIMIT_MEMLOCK is already as high or higher than we need it, not bumping.");
1287 return 0;
1288 }
1289
1290 r = setrlimit_closest(RLIMIT_MEMLOCK, &new_rlimit);
fb3ae275
LP		 1291 if (r < 0)
1292 return log_warning_errno(r, "Setting RLIMIT_MEMLOCK failed, ignoring: %m");
1293
1294 return 0;
1295}
1296
80758717 1297static void test_usr(void) {
80758717 1298
796ac4c1 1299 /* Check that /usr is either on the same file system as / or mounted already. */
80758717 1300
871c44a7
LP		 1301 if (dir_is_empty("/usr") <= 0)
1302 return;
1303
8b173b5e 1304 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
871c44a7
LP		 1305 "Some things will probably break (sometimes even silently) in mysterious ways. "
1306 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1307}
1308
d3b1c508 1309static int enforce_syscall_archs(Set *archs) {
349cc4a5 1310#if HAVE_SECCOMP
d3b1c508
LP		 1311 int r;
1312
83f12b27
FS		 1313 if (!is_seccomp_available())
1314 return 0;
1315
469830d1 1316 r = seccomp_restrict_archs(arg_syscall_archs);
d3b1c508 1317 if (r < 0)
469830d1 1318 return log_error_errno(r, "Failed to enforce system call architecture restrication: %m");
d3b1c508 1319#endif
469830d1 1320 return 0;
d3b1c508
LP		 1321}
1322
b6e2f329
LP		 1323static int status_welcome(void) {
1324 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1325 int r;
1326
5ca02bfc 1327 if (!show_status_on(arg_show_status))
fd8c85c6
LP		 1328 return 0;
1329
d58ad743
LP		 1330 r = parse_os_release(NULL,
1331 "PRETTY_NAME", &pretty_name,
1332 "ANSI_COLOR", &ansi_color,
1333 NULL);
1334 if (r < 0)
1335 log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
1336 "Failed to read os-release file, ignoring: %m");
b6e2f329 1337
dc9b5816 1338 if (log_get_show_color())
a885727a 1339 return status_printf(NULL, 0,
dc9b5816
ZJS		 1340 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1341 isempty(ansi_color) ? "1" : ansi_color,
1342 isempty(pretty_name) ? "Linux" : pretty_name);
1343 else
a885727a 1344 return status_printf(NULL, 0,
dc9b5816
ZJS		 1345 "\nWelcome to %s!\n",
1346 isempty(pretty_name) ? "Linux" : pretty_name);
b6e2f329
LP		 1347}
1348
fdd25311
LP		 1349static int write_container_id(void) {
1350 const char *c;
19854865 1351 int r;
fdd25311
LP		 1352
1353 c = getenv("container");
1354 if (isempty(c))
1355 return 0;
1356
8612da97
LP		 1357 RUN_WITH_UMASK(0022)
1358 r = write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
19854865 1359 if (r < 0)
f1f849b0 1360 return log_warning_errno(r, "Failed to write /run/systemd/container, ignoring: %m");
19854865
LP		 1361
1362 return 1;
1363}
1364
1365static int bump_unix_max_dgram_qlen(void) {
1366 _cleanup_free_ char *qlen = NULL;
1367 unsigned long v;
1368 int r;
1369
3130fca5
LP		 1370 /* Let's bump the net.unix.max_dgram_qlen sysctl. The kernel default of 16 is simply too low. We set the value
1371 * really really early during boot, so that it is actually applied to all our sockets, including the
1372 * $NOTIFY_SOCKET one. */
19854865
LP		 1373
1374 r = read_one_line_file("/proc/sys/net/unix/max_dgram_qlen", &qlen);
1375 if (r < 0)
875622c3 1376 return log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r, "Failed to read AF_UNIX datagram queue length, ignoring: %m");
19854865
LP		 1377
1378 r = safe_atolu(qlen, &v);
1379 if (r < 0)
3130fca5 1380 return log_warning_errno(r, "Failed to parse AF_UNIX datagram queue length '%s', ignoring: %m", qlen);
19854865
LP		 1381
1382 if (v >= DEFAULT_UNIX_MAX_DGRAM_QLEN)
1383 return 0;
1384
57512c89 1385 r = write_string_filef("/proc/sys/net/unix/max_dgram_qlen", WRITE_STRING_FILE_DISABLE_BUFFER, "%lu", DEFAULT_UNIX_MAX_DGRAM_QLEN);
19854865
LP		 1386 if (r < 0)
1387 return log_full_errno(IN_SET(r, -EROFS, -EPERM, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
1388 "Failed to bump AF_UNIX datagram queue length, ignoring: %m");
1389
1390 return 1;
fdd25311
LP		 1391}
1392
32391275
FB		 1393static int fixup_environment(void) {
1394 _cleanup_free_ char *term = NULL;
4dc63c4b 1395 const char *t;
32391275
FB		 1396 int r;
1397
43db615b
LP		 1398 /* Only fix up the environment when we are started as PID 1 */
1399 if (getpid_cached() != 1)
1400 return 0;
1401
1402 /* We expect the environment to be set correctly if run inside a container. */
84af7821
LP		 1403 if (detect_container() > 0)
1404 return 0;
1405
43db615b
LP		 1406 /* When started as PID1, the kernel uses /dev/console for our stdios and uses TERM=linux whatever the backend
1407 * device used by the console. We try to make a better guess here since some consoles might not have support
1408 * for color mode for example.
32391275 1409 *
43db615b 1410 * However if TERM was configured through the kernel command line then leave it alone. */
1d84ad94 1411 r = proc_cmdline_get_key("TERM", 0, &term);
32391275
FB		 1412 if (r < 0)
1413 return r;
32391275 1414
4dc63c4b
LP		 1415 t = term ?: default_term_for_tty("/dev/console");
1416
1417 if (setenv("TERM", t, 1) < 0)
32391275
FB		 1418 return -errno;
1419
9d48671c 1420 /* The kernels sets HOME=/ for init. Let's undo this. */
44ee03d1
ZJS		 1421 if (path_equal_ptr(getenv("HOME"), "/"))
1422 assert_se(unsetenv("HOME") == 0);
9d48671c 1423
32391275
FB		 1424 return 0;
1425}
1426
6808a0bc
LP		 1427static void redirect_telinit(int argc, char *argv[]) {
1428
1429 /* This is compatibility support for SysV, where calling init as a user is identical to telinit. */
1430
1431#if HAVE_SYSV_COMPAT
1432 if (getpid_cached() == 1)
1433 return;
1434
1435 if (!strstr(program_invocation_short_name, "init"))
1436 return;
1437
1438 execv(SYSTEMCTL_BINARY_PATH, argv);
1439 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
a45d7127 1440 exit(EXIT_FAILURE);
6808a0bc
LP		 1441#endif
1442}
1443
4a36297c
LP		 1444static int become_shutdown(
1445 const char *shutdown_verb,
7eb35049 1446 int retval) {
4a36297c
LP		 1447
1448 char log_level[DECIMAL_STR_MAX(int) + 1],
e73c54b8
JK		 1449 exit_code[DECIMAL_STR_MAX(uint8_t) + 1],
1450 timeout[DECIMAL_STR_MAX(usec_t) + 1];
4a36297c 1451
e73c54b8 1452 const char* command_line[13] = {
4a36297c
LP		 1453 SYSTEMD_SHUTDOWN_BINARY_PATH,
1454 shutdown_verb,
e73c54b8 1455 "--timeout", timeout,
4a36297c
LP		 1456 "--log-level", log_level,
1457 "--log-target",
1458 };
1459
1460 _cleanup_strv_free_ char **env_block = NULL;
e73c54b8 1461 size_t pos = 7;
4a36297c 1462 int r;
acafd7d8 1463 usec_t watchdog_timer = 0;
4a36297c 1464
7eb35049 1465 assert(shutdown_verb);
234519ae 1466 assert(!command_line[pos]);
4a36297c
LP		 1467 env_block = strv_copy(environ);
1468
1469 xsprintf(log_level, "%d", log_get_max_level());
e73c54b8 1470 xsprintf(timeout, "%" PRI_USEC "us", arg_default_timeout_stop_usec);
4a36297c
LP		 1471
1472 switch (log_get_target()) {
1473
1474 case LOG_TARGET_KMSG:
1475 case LOG_TARGET_JOURNAL_OR_KMSG:
1476 case LOG_TARGET_SYSLOG_OR_KMSG:
1477 command_line[pos++] = "kmsg";
1478 break;
1479
1480 case LOG_TARGET_NULL:
1481 command_line[pos++] = "null";
1482 break;
1483
1484 case LOG_TARGET_CONSOLE:
1485 default:
1486 command_line[pos++] = "console";
1487 break;
1488 };
1489
1490 if (log_get_show_color())
1491 command_line[pos++] = "--log-color";
1492
1493 if (log_get_show_location())
1494 command_line[pos++] = "--log-location";
1495
c5673ed0
DS		 1496 if (log_get_show_time())
1497 command_line[pos++] = "--log-time";
1498
4a36297c
LP		 1499 if (streq(shutdown_verb, "exit")) {
1500 command_line[pos++] = "--exit-code";
1501 command_line[pos++] = exit_code;
1502 xsprintf(exit_code, "%d", retval);
1503 }
1504
1505 assert(pos < ELEMENTSOF(command_line));
1506
acafd7d8 1507 if (streq(shutdown_verb, "reboot"))
65224c1d 1508 watchdog_timer = arg_reboot_watchdog;
acafd7d8
LB		 1509 else if (streq(shutdown_verb, "kexec"))
1510 watchdog_timer = arg_kexec_watchdog;
1511
1512 if (watchdog_timer > 0 && watchdog_timer != USEC_INFINITY) {
7eb35049 1513
4a36297c
LP		 1514 char *e;
1515
acafd7d8 1516 /* If we reboot or kexec let's set the shutdown
4a36297c
LP		 1517 * watchdog and tell the shutdown binary to
1518 * repeatedly ping it */
acafd7d8 1519 r = watchdog_set_timeout(&watchdog_timer);
4a36297c
LP		 1520 watchdog_close(r < 0);
1521
1522 /* Tell the binary how often to ping, ignore failure */
acafd7d8 1523 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, watchdog_timer) > 0)
8a2c1fbf
EJ		 1524 (void) strv_consume(&env_block, e);
1525
1526 if (arg_watchdog_device &&
1527 asprintf(&e, "WATCHDOG_DEVICE=%s", arg_watchdog_device) > 0)
1528 (void) strv_consume(&env_block, e);
4a36297c
LP		 1529 } else
1530 watchdog_close(true);
1531
1532 /* Avoid the creation of new processes forked by the
1533 * kernel; at this point, we will not listen to the
1534 * signals anyway */
1535 if (detect_container() <= 0)
1536 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1537
1538 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1539 return -errno;
1540}
1541
e839bafd
LP		 1542static void initialize_clock(void) {
1543 int r;
1544
3753325b
LP		 1545 /* This is called very early on, before we parse the kernel command line or otherwise figure out why
1546 * we are running, but only once. */
1547
e839bafd
LP		 1548 if (clock_is_localtime(NULL) > 0) {
1549 int min;
1550
1551 /*
1552 * The very first call of settimeofday() also does a time warp in the kernel.
1553 *
1554 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on external tools to take care
1555 * of maintaining the RTC and do all adjustments. This matches the behavior of Windows, which leaves
1556 * the RTC alone if the registry tells that the RTC runs in UTC.
1557 */
1558 r = clock_set_timezone(&min);
1559 if (r < 0)
1560 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1561 else
1562 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1563
d46b79bb 1564 } else if (!in_initrd())
e839bafd
LP		 1565 /*
1566 * Do a dummy very first call to seal the kernel's time warp magic.
1567 *
1568 * Do not call this from inside the initrd. The initrd might not carry /etc/adjtime with LOCAL, but the
1569 * real system could be set up that way. In such case, we need to delay the time-warp or the sealing
1570 * until we reach the real system.
1571 *
1572 * Do no set the kernel's timezone. The concept of local time cannot be supported reliably, the time
1573 * will jump or be incorrect at every daylight saving time change. All kernel local time concepts will
1574 * be treated as UTC that way.
1575 */
1576 (void) clock_reset_timewarp();
e839bafd
LP		 1577
1578 r = clock_apply_epoch();
1579 if (r < 0)
1580 log_error_errno(r, "Current system time is before build time, but cannot correct: %m");
1581 else if (r > 0)
1582 log_info("System time before build time, advancing clock.");
1583}
1584
3753325b
LP		 1585static void apply_clock_update(void) {
1586 struct timespec ts;
1587
1588 /* This is called later than initialize_clock(), i.e. after we parsed configuration files/kernel
1589 * command line and such. */
1590
1591 if (arg_clock_usec == 0)
1592 return;
1593
45250e66
LP		 1594 if (getpid_cached() != 1)
1595 return;
1596
3753325b
LP		 1597 if (clock_settime(CLOCK_REALTIME, timespec_store(&ts, arg_clock_usec)) < 0)
1598 log_error_errno(errno, "Failed to set system clock to time specified on kernel command line: %m");
1599 else {
1600 char buf[FORMAT_TIMESTAMP_MAX];
1601
1602 log_info("Set system clock to %s, as specified on the kernel command line.",
1603 format_timestamp(buf, sizeof(buf), arg_clock_usec));
1604 }
1605}
1606
d247f232 1607static void cmdline_take_random_seed(void) {
d247f232
LP		 1608 size_t suggested;
1609 int r;
1610
1611 if (arg_random_seed_size == 0)
1612 return;
1613
1614 if (getpid_cached() != 1)
1615 return;
1616
1617 assert(arg_random_seed);
1618 suggested = random_pool_size();
1619
1620 if (arg_random_seed_size < suggested)
1621 log_warning("Random seed specified on kernel command line has size %zu, but %zu bytes required to fill entropy pool.",
1622 arg_random_seed_size, suggested);
1623
61bd7d1e 1624 r = random_write_entropy(-1, arg_random_seed, arg_random_seed_size, true);
d247f232
LP		 1625 if (r < 0) {
1626 log_warning_errno(r, "Failed to credit entropy specified on kernel command line, ignoring: %m");
1627 return;
1628 }
1629
1630 log_notice("Successfully credited entropy passed on kernel command line.\n"
1631 "Note that the seed provided this way is accessible to unprivileged programs. This functionality should not be used outside of testing environments.");
1632}
1633
1e41242e 1634static void initialize_coredump(bool skip_setup) {
752bcb77 1635#if ENABLE_COREDUMP
1e41242e
LP		 1636 if (getpid_cached() != 1)
1637 return;
1638
1639 /* Don't limit the core dump size, so that coredump handlers such as systemd-coredump (which honour the limit)
1640 * will process core dumps for system services by default. */
1641 if (setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY)) < 0)
1642 log_warning_errno(errno, "Failed to set RLIMIT_CORE: %m");
1643
c6885f5f
FB		 1644 /* But at the same time, turn off the core_pattern logic by default, so that no
1645 * coredumps are stored until the systemd-coredump tool is enabled via
1646 * sysctl. However it can be changed via the kernel command line later so core
1647 * dumps can still be generated during early startup and in initramfs. */
1e41242e 1648 if (!skip_setup)
e557b1a6 1649 disable_coredumps();
752bcb77 1650#endif
1e41242e
LP		 1651}
1652
c6885f5f
FB		 1653static void initialize_core_pattern(bool skip_setup) {
1654 int r;
1655
1656 if (skip_setup || !arg_early_core_pattern)
1657 return;
1658
1659 if (getpid_cached() != 1)
1660 return;
1661
57512c89 1662 r = write_string_file("/proc/sys/kernel/core_pattern", arg_early_core_pattern, WRITE_STRING_FILE_DISABLE_BUFFER);
c6885f5f
FB		 1663 if (r < 0)
1664 log_warning_errno(r, "Failed to write '%s' to /proc/sys/kernel/core_pattern, ignoring: %m", arg_early_core_pattern);
1665}
1666
61fbbac1
ZJS		 1667static void update_cpu_affinity(bool skip_setup) {
1668 _cleanup_free_ char *mask = NULL;
1669
1670 if (skip_setup || !arg_cpu_affinity.set)
1671 return;
1672
1673 assert(arg_cpu_affinity.allocated > 0);
1674
1675 mask = cpu_set_to_string(&arg_cpu_affinity);
1676 log_debug("Setting CPU affinity to %s.", strnull(mask));
1677
1678 if (sched_setaffinity(0, arg_cpu_affinity.allocated, arg_cpu_affinity.set) < 0)
1679 log_warning_errno(errno, "Failed to set CPU affinity: %m");
1680}
1681
b070c7c0
MS		 1682static void update_numa_policy(bool skip_setup) {
1683 int r;
1684 _cleanup_free_ char *nodes = NULL;
1685 const char * policy = NULL;
1686
1687 if (skip_setup || !mpol_is_valid(numa_policy_get_type(&arg_numa_policy)))
1688 return;
1689
1690 if (DEBUG_LOGGING) {
1691 policy = mpol_to_string(numa_policy_get_type(&arg_numa_policy));
1692 nodes = cpu_set_to_range_string(&arg_numa_policy.nodes);
1693 log_debug("Setting NUMA policy to %s, with nodes %s.", strnull(policy), strnull(nodes));
1694 }
1695
1696 r = apply_numa_policy(&arg_numa_policy);
1697 if (r == -EOPNOTSUPP)
1698 log_debug_errno(r, "NUMA support not available, ignoring.");
1699 else if (r < 0)
1700 log_warning_errno(r, "Failed to set NUMA memory policy: %m");
1701}
1702
3c7878f9
LP		 1703static void do_reexecute(
1704 int argc,
1705 char *argv[],
1706 const struct rlimit *saved_rlimit_nofile,
1707 const struct rlimit *saved_rlimit_memlock,
1708 FDSet *fds,
1709 const char *switch_root_dir,
1710 const char *switch_root_init,
1711 const char **ret_error_message) {
1712
1713 unsigned i, j, args_size;
1714 const char **args;
1715 int r;
1716
1717 assert(saved_rlimit_nofile);
1718 assert(saved_rlimit_memlock);
1719 assert(ret_error_message);
1720
1721 /* Close and disarm the watchdog, so that the new instance can reinitialize it, but doesn't get rebooted while
1722 * we do that */
1723 watchdog_close(true);
1724
ddfa8b0b
LP		 1725 /* Reset RLIMIT_NOFILE + RLIMIT_MEMLOCK back to the kernel defaults, so that the new systemd can pass
1726 * the kernel default to its child processes */
1727 if (saved_rlimit_nofile->rlim_cur != 0)
3c7878f9 1728 (void) setrlimit(RLIMIT_NOFILE, saved_rlimit_nofile);
ddfa8b0b 1729 if (saved_rlimit_memlock->rlim_cur != RLIM_INFINITY)
3c7878f9
LP		 1730 (void) setrlimit(RLIMIT_MEMLOCK, saved_rlimit_memlock);
1731
1732 if (switch_root_dir) {
1733 /* Kill all remaining processes from the initrd, but don't wait for them, so that we can handle the
1734 * SIGCHLD for them after deserializing. */
e73c54b8 1735 broadcast_signal(SIGTERM, false, true, arg_default_timeout_stop_usec);
3c7878f9
LP		 1736
1737 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1738 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1739 if (r < 0)
1740 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1741 }
1742
1743 args_size = MAX(6, argc+1);
1744 args = newa(const char*, args_size);
1745
1746 if (!switch_root_init) {
1747 char sfd[DECIMAL_STR_MAX(int) + 1];
1748
1749 /* First try to spawn ourselves with the right path, and with full serialization. We do this only if
1750 * the user didn't specify an explicit init to spawn. */
1751
1752 assert(arg_serialization);
1753 assert(fds);
1754
1755 xsprintf(sfd, "%i", fileno(arg_serialization));
1756
1757 i = 0;
1758 args[i++] = SYSTEMD_BINARY_PATH;
1759 if (switch_root_dir)
1760 args[i++] = "--switched-root";
1761 args[i++] = arg_system ? "--system" : "--user";
1762 args[i++] = "--deserialize";
1763 args[i++] = sfd;
1764 args[i++] = NULL;
1765
1766 assert(i <= args_size);
1767
1768 /*
1769 * We want valgrind to print its memory usage summary before reexecution. Valgrind won't do this is on
1770 * its own on exec(), but it will do it on exit(). Hence, to ensure we get a summary here, fork() off
1771 * a child, let it exit() cleanly, so that it prints the summary, and wait() for it in the parent,
1772 * before proceeding into the exec().
1773 */
1774 valgrind_summary_hack();
1775
1776 (void) execv(args[0], (char* const*) args);
1777 log_debug_errno(errno, "Failed to execute our own binary, trying fallback: %m");
1778 }
1779
1780 /* Try the fallback, if there is any, without any serialization. We pass the original argv[] and envp[]. (Well,
1781 * modulo the ordering changes due to getopt() in argv[], and some cleanups in envp[], but let's hope that
1782 * doesn't matter.) */
1783
1784 arg_serialization = safe_fclose(arg_serialization);
1785 fds = fdset_free(fds);
1786
1787 /* Reopen the console */
1788 (void) make_console_stdio();
1789
1790 for (j = 1, i = 1; j < (unsigned) argc; j++)
1791 args[i++] = argv[j];
1792 args[i++] = NULL;
1793 assert(i <= args_size);
1794
5238e957 1795 /* Re-enable any blocked signals, especially important if we switch from initial ramdisk to init=... */
3c7878f9
LP		 1796 (void) reset_all_signal_handlers();
1797 (void) reset_signal_mask();
595225af 1798 (void) rlimit_nofile_safe();
3c7878f9
LP		 1799
1800 if (switch_root_init) {
1801 args[0] = switch_root_init;
a5cede8c 1802 (void) execve(args[0], (char* const*) args, saved_env);
3c7878f9
LP		 1803 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1804 }
1805
1806 args[0] = "/sbin/init";
1807 (void) execv(args[0], (char* const*) args);
1808 r = -errno;
1809
1810 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
1811 ANSI_HIGHLIGHT_RED " !! " ANSI_NORMAL,
1812 "Failed to execute /sbin/init");
1813
1814 if (r == -ENOENT) {
1815 log_warning("No /sbin/init, trying fallback");
1816
1817 args[0] = "/bin/sh";
1818 args[1] = NULL;
a5cede8c 1819 (void) execve(args[0], (char* const*) args, saved_env);
3c7878f9
LP		 1820 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1821 } else
1822 log_warning_errno(r, "Failed to execute /sbin/init, giving up: %m");
1823
1824 *ret_error_message = "Failed to execute fallback shell";
1825}
1826
7eb35049
LP		 1827static int invoke_main_loop(
1828 Manager *m,
a9fd4cd1
FB		 1829 const struct rlimit *saved_rlimit_nofile,
1830 const struct rlimit *saved_rlimit_memlock,
7eb35049
LP		 1831 bool *ret_reexecute,
1832 int *ret_retval, /* Return parameters relevant for shutting down */
1833 const char **ret_shutdown_verb, /* … */
1834 FDSet **ret_fds, /* Return parameters for reexecuting */
1835 char **ret_switch_root_dir, /* … */
1836 char **ret_switch_root_init, /* … */
1837 const char **ret_error_message) {
1838
1839 int r;
1840
1841 assert(m);
a9fd4cd1
FB		 1842 assert(saved_rlimit_nofile);
1843 assert(saved_rlimit_memlock);
7eb35049
LP		 1844 assert(ret_reexecute);
1845 assert(ret_retval);
1846 assert(ret_shutdown_verb);
1847 assert(ret_fds);
1848 assert(ret_switch_root_dir);
1849 assert(ret_switch_root_init);
1850 assert(ret_error_message);
1851
1852 for (;;) {
1853 r = manager_loop(m);
1854 if (r < 0) {
1855 *ret_error_message = "Failed to run main loop";
1856 return log_emergency_errno(r, "Failed to run main loop: %m");
1857 }
1858
3ca4d0b3 1859 switch ((ManagerObjective) r) {
7eb35049 1860
a6ecbf83 1861 case MANAGER_RELOAD: {
bda7d78b 1862 LogTarget saved_log_target;
a6ecbf83
FB		 1863 int saved_log_level;
1864
7eb35049
LP		 1865 log_info("Reloading.");
1866
3fe91079 1867 /* First, save any overridden log level/target, then parse the configuration file, which might
bda7d78b
FB		 1868 * change the log level to new settings. */
1869
a6ecbf83 1870 saved_log_level = m->log_level_overridden ? log_get_max_level() : -1;
bda7d78b 1871 saved_log_target = m->log_target_overridden ? log_get_target() : _LOG_TARGET_INVALID;
a6ecbf83 1872
a9fd4cd1 1873 (void) parse_configuration(saved_rlimit_nofile, saved_rlimit_memlock);
7eb35049
LP		 1874
1875 set_manager_defaults(m);
986935cf 1876 set_manager_settings(m);
7eb35049 1877
61fbbac1 1878 update_cpu_affinity(false);
b070c7c0 1879 update_numa_policy(false);
61fbbac1 1880
a6ecbf83
FB		 1881 if (saved_log_level >= 0)
1882 manager_override_log_level(m, saved_log_level);
bda7d78b
FB		 1883 if (saved_log_target >= 0)
1884 manager_override_log_target(m, saved_log_target);
a6ecbf83 1885
7eb35049
LP		 1886 r = manager_reload(m);
1887 if (r < 0)
7a35fa24
LP		 1888 /* Reloading failed before the point of no return. Let's continue running as if nothing happened. */
1889 m->objective = MANAGER_OK;
7eb35049
LP		 1890
1891 break;
a6ecbf83 1892 }
7eb35049
LP		 1893
1894 case MANAGER_REEXECUTE:
1895
1896 r = prepare_reexecute(m, &arg_serialization, ret_fds, false);
1897 if (r < 0) {
1898 *ret_error_message = "Failed to prepare for reexecution";
1899 return r;
1900 }
1901
1902 log_notice("Reexecuting.");
1903
1904 *ret_reexecute = true;
1905 *ret_retval = EXIT_SUCCESS;
1906 *ret_shutdown_verb = NULL;
1907 *ret_switch_root_dir = *ret_switch_root_init = NULL;
1908
1909 return 0;
1910
1911 case MANAGER_SWITCH_ROOT:
1912 if (!m->switch_root_init) {
1913 r = prepare_reexecute(m, &arg_serialization, ret_fds, true);
1914 if (r < 0) {
1915 *ret_error_message = "Failed to prepare for reexecution";
1916 return r;
1917 }
1918 } else
1919 *ret_fds = NULL;
1920
1921 log_notice("Switching root.");
1922
1923 *ret_reexecute = true;
1924 *ret_retval = EXIT_SUCCESS;
1925 *ret_shutdown_verb = NULL;
1926
1927 /* Steal the switch root parameters */
49052946
YW		 1928 *ret_switch_root_dir = TAKE_PTR(m->switch_root);
1929 *ret_switch_root_init = TAKE_PTR(m->switch_root_init);
7eb35049
LP		 1930
1931 return 0;
1932
1933 case MANAGER_EXIT:
1934
1935 if (MANAGER_IS_USER(m)) {
1936 log_debug("Exit.");
1937
1938 *ret_reexecute = false;
1939 *ret_retval = m->return_value;
1940 *ret_shutdown_verb = NULL;
1941 *ret_fds = NULL;
1942 *ret_switch_root_dir = *ret_switch_root_init = NULL;
1943
1944 return 0;
1945 }
1946
1947 _fallthrough_;
1948 case MANAGER_REBOOT:
1949 case MANAGER_POWEROFF:
1950 case MANAGER_HALT:
1951 case MANAGER_KEXEC: {
af41e508
LP		 1952 static const char * const table[_MANAGER_OBJECTIVE_MAX] = {
1953 [MANAGER_EXIT] = "exit",
1954 [MANAGER_REBOOT] = "reboot",
7eb35049 1955 [MANAGER_POWEROFF] = "poweroff",
af41e508
LP		 1956 [MANAGER_HALT] = "halt",
1957 [MANAGER_KEXEC] = "kexec",
7eb35049
LP		 1958 };
1959
1960 log_notice("Shutting down.");
1961
1962 *ret_reexecute = false;
1963 *ret_retval = m->return_value;
af41e508 1964 assert_se(*ret_shutdown_verb = table[m->objective]);
7eb35049
LP		 1965 *ret_fds = NULL;
1966 *ret_switch_root_dir = *ret_switch_root_init = NULL;
1967
1968 return 0;
1969 }
1970
1971 default:
af41e508 1972 assert_not_reached("Unknown or unexpected manager objective.");
7eb35049
LP		 1973 }
1974 }
1975}
1976
31aef7ff
LP		 1977static void log_execution_mode(bool *ret_first_boot) {
1978 assert(ret_first_boot);
1979
1980 if (arg_system) {
1981 int v;
1982
91b79ba8
ZJS		 1983 log_info("systemd " GIT_VERSION " running in %ssystem mode. (%s)",
1984 arg_action == ACTION_TEST ? "test " : "",
1985 systemd_features);
31aef7ff
LP		 1986
1987 v = detect_virtualization();
1988 if (v > 0)
1989 log_info("Detected virtualization %s.", virtualization_to_string(v));
1990
1991 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1992
1993 if (in_initrd()) {
1994 *ret_first_boot = false;
1995 log_info("Running in initial RAM disk.");
1996 } else {
583cef3b
HS		 1997 int r;
1998 _cleanup_free_ char *id_text = NULL;
1999
2000 /* Let's check whether we are in first boot. We use /etc/machine-id as flag file
2001 * for this: If it is missing or contains the value "uninitialized", this is the
2002 * first boot. In any other case, it is not. This allows container managers and
2003 * installers to provision a couple of files already. If the container manager
2004 * wants to provision the machine ID itself it should pass $container_uuid to PID 1. */
2005
2006 r = read_one_line_file("/etc/machine-id", &id_text);
2007 if (r < 0 || streq(id_text, "uninitialized")) {
2008 if (r < 0 && r != -ENOENT)
2009 log_warning_errno(r, "Unexpected error while reading /etc/machine-id, ignoring: %m");
2010
2011 *ret_first_boot = true;
2012 log_info("Detected first boot.");
2013 } else {
2014 *ret_first_boot = false;
2015 log_debug("Detected initialized system, this is not the first boot.");
2016 }
31aef7ff
LP		 2017 }
2018 } else {
b9e90f3a
LP		 2019 if (DEBUG_LOGGING) {
2020 _cleanup_free_ char *t;
31aef7ff 2021
b9e90f3a 2022 t = uid_to_name(getuid());
91b79ba8
ZJS		 2023 log_debug("systemd " GIT_VERSION " running in %suser mode for user " UID_FMT "/%s. (%s)",
2024 arg_action == ACTION_TEST ? " test" : "",
2025 getuid(), strna(t), systemd_features);
b9e90f3a 2026 }
31aef7ff
LP		 2027
2028 *ret_first_boot = false;
2029 }
2030}
2031
5afbaa36
LP		 2032static int initialize_runtime(
2033 bool skip_setup,
3023f2fe 2034 bool first_boot,
5afbaa36
LP		 2035 struct rlimit *saved_rlimit_nofile,
2036 struct rlimit *saved_rlimit_memlock,
2037 const char **ret_error_message) {
5afbaa36
LP		 2038 int r;
2039
2040 assert(ret_error_message);
2041
2042 /* Sets up various runtime parameters. Many of these initializations are conditionalized:
2043 *
2044 * - Some only apply to --system instances
2045 * - Some only apply to --user instances
2046 * - Some only apply when we first start up, but not when we reexecute
2047 */
2048
2d776038
LP		 2049 if (arg_action != ACTION_RUN)
2050 return 0;
2051
61fbbac1 2052 update_cpu_affinity(skip_setup);
b070c7c0 2053 update_numa_policy(skip_setup);
61fbbac1 2054
3c3c6cb9 2055 if (arg_system) {
5238e957 2056 /* Make sure we leave a core dump without panicking the kernel. */
3c3c6cb9 2057 install_crash_handler();
5afbaa36 2058
3c3c6cb9 2059 if (!skip_setup) {
143fadf3 2060 r = mount_cgroup_controllers();
3c3c6cb9
LP		 2061 if (r < 0) {
2062 *ret_error_message = "Failed to mount cgroup hierarchies";
2063 return r;
2064 }
2065
2066 status_welcome();
b6fad306 2067 (void) hostname_setup(true);
3023f2fe
HS		 2068 /* Force transient machine-id on first boot. */
2069 machine_id_setup(NULL, first_boot, arg_machine_id, NULL);
df883de9 2070 (void) loopback_setup();
3c3c6cb9 2071 bump_unix_max_dgram_qlen();
a8b627aa 2072 bump_file_max_and_nr_open();
3c3c6cb9
LP		 2073 test_usr();
2074 write_container_id();
2075 }
8a2c1fbf 2076
3c3c6cb9
LP		 2077 if (arg_watchdog_device) {
2078 r = watchdog_set_device(arg_watchdog_device);
2079 if (r < 0)
2080 log_warning_errno(r, "Failed to set watchdog device to %s, ignoring: %m", arg_watchdog_device);
2081 }
32429805
LP		 2082 } else {
2083 _cleanup_free_ char *p = NULL;
2084
2085 /* Create the runtime directory and place the inaccessible device nodes there, if we run in
2086 * user mode. In system mode mount_setup() already did that. */
2087
2088 r = xdg_user_runtime_dir(&p, "/systemd");
2089 if (r < 0) {
2090 *ret_error_message = "$XDG_RUNTIME_DIR is not set";
2091 return log_emergency_errno(r, "Failed to determine $XDG_RUNTIME_DIR path: %m");
2092 }
2093
e813a74a 2094 (void) mkdir_p_label(p, 0755);
32429805 2095 (void) make_inaccessible_nodes(p, UID_INVALID, GID_INVALID);
3c3c6cb9 2096 }
5afbaa36
LP		 2097
2098 if (arg_timer_slack_nsec != NSEC_INFINITY)
2099 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
3a671cd1 2100 log_warning_errno(errno, "Failed to adjust timer slack, ignoring: %m");
5afbaa36
LP		 2101
2102 if (arg_system && !cap_test_all(arg_capability_bounding_set)) {
2103 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set);
2104 if (r < 0) {
2105 *ret_error_message = "Failed to drop capability bounding set of usermode helpers";
2106 return log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
2107 }
2108
2109 r = capability_bounding_set_drop(arg_capability_bounding_set, true);
2110 if (r < 0) {
2111 *ret_error_message = "Failed to drop capability bounding set";
2112 return log_emergency_errno(r, "Failed to drop capability bounding set: %m");
2113 }
2114 }
2115
39362f6f
JB		 2116 if (arg_system && arg_no_new_privs) {
2117 if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) {
2118 *ret_error_message = "Failed to disable new privileges";
2119 return log_emergency_errno(errno, "Failed to disable new privileges: %m");
2120 }
2121 }
2122
5afbaa36
LP		 2123 if (arg_syscall_archs) {
2124 r = enforce_syscall_archs(arg_syscall_archs);
2125 if (r < 0) {
2126 *ret_error_message = "Failed to set syscall architectures";
2127 return r;
2128 }
2129 }
2130
2131 if (!arg_system)
2132 /* Become reaper of our children */
2133 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0)
2134 log_warning_errno(errno, "Failed to make us a subreaper: %m");
2135
a17c1712
LP		 2136 /* Bump up RLIMIT_NOFILE for systemd itself */
2137 (void) bump_rlimit_nofile(saved_rlimit_nofile);
2138 (void) bump_rlimit_memlock(saved_rlimit_memlock);
5afbaa36
LP		 2139
2140 return 0;
2141}
2142
6acca5fc
LP		 2143static int do_queue_default_job(
2144 Manager *m,
2145 const char **ret_error_message) {
2146
2147 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
f1d075dc
ZJS		 2148 const char *unit;
2149 Job *job;
2150 Unit *target;
6acca5fc
LP		 2151 int r;
2152
8755dbad 2153 if (arg_default_unit)
f1d075dc 2154 unit = arg_default_unit;
8755dbad 2155 else if (in_initrd())
f1d075dc 2156 unit = SPECIAL_INITRD_TARGET;
8755dbad 2157 else
f1d075dc 2158 unit = SPECIAL_DEFAULT_TARGET;
8755dbad 2159
f1d075dc 2160 log_debug("Activating default unit: %s", unit);
8755dbad 2161
f1d075dc 2162 r = manager_load_startable_unit_or_warn(m, unit, NULL, &target);
8755dbad
ZJS		 2163 if (r < 0 && in_initrd() && !arg_default_unit) {
2164 /* Fall back to default.target, which we used to always use by default. Only do this if no
2165 * explicit configuration was given. */
2166
2167 log_info("Falling back to " SPECIAL_DEFAULT_TARGET ".");
6acca5fc 2168
8755dbad
ZJS		 2169 r = manager_load_startable_unit_or_warn(m, SPECIAL_DEFAULT_TARGET, NULL, &target);
2170 }
4109ede7 2171 if (r < 0) {
8755dbad 2172 log_info("Falling back to " SPECIAL_RESCUE_TARGET ".");
6acca5fc 2173
4109ede7 2174 r = manager_load_startable_unit_or_warn(m, SPECIAL_RESCUE_TARGET, NULL, &target);
6acca5fc 2175 if (r < 0) {
8755dbad
ZJS		 2176 *ret_error_message = r == -ERFKILL ? SPECIAL_RESCUE_TARGET " masked"
2177 : "Failed to load " SPECIAL_RESCUE_TARGET;
4109ede7 2178 return r;
6acca5fc
LP		 2179 }
2180 }
2181
2182 assert(target->load_state == UNIT_LOADED);
2183
f1d075dc 2184 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, NULL, &error, &job);
6acca5fc
LP		 2185 if (r == -EPERM) {
2186 log_debug_errno(r, "Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
2187
2188 sd_bus_error_free(&error);
2189
f1d075dc 2190 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, NULL, &error, &job);
6acca5fc
LP		 2191 if (r < 0) {
2192 *ret_error_message = "Failed to start default target";
2193 return log_emergency_errno(r, "Failed to start default target: %s", bus_error_message(&error, r));
2194 }
2195
2196 } else if (r < 0) {
2197 *ret_error_message = "Failed to isolate default target";
2198 return log_emergency_errno(r, "Failed to isolate default target: %s", bus_error_message(&error, r));
c86c31d9
ZJS		 2199 } else
2200 log_info("Queued %s job for default target %s.",
2201 job_type_to_string(job->type),
2202 unit_status_string(job->unit));
6acca5fc 2203
f1d075dc 2204 m->default_unit_job_id = job->id;
6acca5fc
LP		 2205
2206 return 0;
2207}
2208
a9fd4cd1
FB		 2209static void save_rlimits(struct rlimit *saved_rlimit_nofile,
2210 struct rlimit *saved_rlimit_memlock) {
2211
2212 assert(saved_rlimit_nofile);
2213 assert(saved_rlimit_memlock);
2214
2215 if (getrlimit(RLIMIT_NOFILE, saved_rlimit_nofile) < 0)
2216 log_warning_errno(errno, "Reading RLIMIT_NOFILE failed, ignoring: %m");
2217
2218 if (getrlimit(RLIMIT_MEMLOCK, saved_rlimit_memlock) < 0)
2219 log_warning_errno(errno, "Reading RLIMIT_MEMLOCK failed, ignoring: %m");
2220}
2221
2222static void fallback_rlimit_nofile(const struct rlimit *saved_rlimit_nofile) {
2223 struct rlimit *rl;
2224
2225 if (arg_default_rlimit[RLIMIT_NOFILE])
2226 return;
2227
2228 /* Make sure forked processes get limits based on the original kernel setting */
2229
2230 rl = newdup(struct rlimit, saved_rlimit_nofile, 1);
2231 if (!rl) {
2232 log_oom();
2233 return;
2234 }
2235
2236 /* Bump the hard limit for system services to a substantially higher value. The default
2237 * hard limit current kernels set is pretty low (4K), mostly for historical
2238 * reasons. According to kernel developers, the fd handling in recent kernels has been
2239 * optimized substantially enough, so that we can bump the limit now, without paying too
2240 * high a price in memory or performance. Note however that we only bump the hard limit,
2241 * not the soft limit. That's because select() works the way it works, and chokes on fds
2242 * >= 1024. If we'd bump the soft limit globally, it might accidentally happen to
2243 * unexpecting programs that they get fds higher than what they can process using
2244 * select(). By only bumping the hard limit but leaving the low limit as it is we avoid
2245 * this pitfall: programs that are written by folks aware of the select() problem in mind
2246 * (and thus use poll()/epoll instead of select(), the way everybody should) can
2247 * explicitly opt into high fds by bumping their soft limit beyond 1024, to the hard limit
2248 * we pass. */
2249 if (arg_system) {
2250 int nr;
2251
2252 /* Get the underlying absolute limit the kernel enforces */
2253 nr = read_nr_open();
2254
2255 rl->rlim_max = MIN((rlim_t) nr, MAX(rl->rlim_max, (rlim_t) HIGH_RLIMIT_NOFILE));
2256 }
2257
2258 /* If for some reason we were invoked with a soft limit above 1024 (which should never
2259 * happen!, but who knows what we get passed in from pam_limit when invoked as --user
2260 * instance), then lower what we pass on to not confuse our children */
2261 rl->rlim_cur = MIN(rl->rlim_cur, (rlim_t) FD_SETSIZE);
2262
2263 arg_default_rlimit[RLIMIT_NOFILE] = rl;
2264}
2265
2266static void fallback_rlimit_memlock(const struct rlimit *saved_rlimit_memlock) {
2267 struct rlimit *rl;
2268
2269 /* Pass the original value down to invoked processes */
2270
2271 if (arg_default_rlimit[RLIMIT_MEMLOCK])
2272 return;
2273
2274 rl = newdup(struct rlimit, saved_rlimit_memlock, 1);
2275 if (!rl) {
2276 log_oom();
2277 return;
2278 }
2279
2280 arg_default_rlimit[RLIMIT_MEMLOCK] = rl;
2281}
2282
fb39af4c
ZJS		 2283static void reset_arguments(void) {
2284 /* Frees/resets arg_* variables, with a few exceptions commented below. */
970777b5
LP		 2285
2286 arg_default_unit = mfree(arg_default_unit);
fb39af4c
ZJS		 2287
2288 /* arg_system — ignore */
2289
2290 arg_dump_core = true;
2291 arg_crash_chvt = -1;
2292 arg_crash_shell = false;
2293 arg_crash_reboot = false;
970777b5 2294 arg_confirm_spawn = mfree(arg_confirm_spawn);
fb39af4c 2295 arg_show_status = _SHOW_STATUS_INVALID;
36cf4507 2296 arg_status_unit_format = STATUS_UNIT_FORMAT_DEFAULT;
fb39af4c
ZJS		 2297 arg_switched_root = false;
2298 arg_pager_flags = 0;
2299 arg_service_watchdogs = true;
2300 arg_default_std_output = EXEC_OUTPUT_JOURNAL;
2301 arg_default_std_error = EXEC_OUTPUT_INHERIT;
2302 arg_default_restart_usec = DEFAULT_RESTART_USEC;
2303 arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
2304 arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
2305 arg_default_timeout_abort_usec = DEFAULT_TIMEOUT_USEC;
2306 arg_default_timeout_abort_set = false;
2307 arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
2308 arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
2309 arg_runtime_watchdog = 0;
65224c1d 2310 arg_reboot_watchdog = 10 * USEC_PER_MINUTE;
acafd7d8 2311 arg_kexec_watchdog = 0;
fb39af4c
ZJS		 2312 arg_early_core_pattern = NULL;
2313 arg_watchdog_device = NULL;
2314
970777b5 2315 arg_default_environment = strv_free(arg_default_environment);
fb39af4c
ZJS		 2316 rlimit_free_all(arg_default_rlimit);
2317
2318 arg_capability_bounding_set = CAP_ALL;
2319 arg_no_new_privs = false;
2320 arg_timer_slack_nsec = NSEC_INFINITY;
2321 arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
2322
970777b5 2323 arg_syscall_archs = set_free(arg_syscall_archs);
61fbbac1 2324
fb39af4c
ZJS		 2325 /* arg_serialization — ignore */
2326
2327 arg_default_cpu_accounting = -1;
2328 arg_default_io_accounting = false;
2329 arg_default_ip_accounting = false;
2330 arg_default_blockio_accounting = false;
2331 arg_default_memory_accounting = MEMORY_ACCOUNTING_DEFAULT;
2332 arg_default_tasks_accounting = true;
3a0f06c4 2333 arg_default_tasks_max = DEFAULT_TASKS_MAX;
fb39af4c
ZJS		 2334 arg_machine_id = (sd_id128_t) {};
2335 arg_cad_burst_action = EMERGENCY_ACTION_REBOOT_FORCE;
2336 arg_default_oom_policy = OOM_STOP;
2337
61fbbac1 2338 cpu_set_reset(&arg_cpu_affinity);
b070c7c0 2339 numa_policy_reset(&arg_numa_policy);
d247f232
LP		 2340
2341 arg_random_seed = mfree(arg_random_seed);
2342 arg_random_seed_size = 0;
33d943d1 2343 arg_clock_usec = 0;
970777b5
LP		 2344}
2345
a9fd4cd1
FB		 2346static int parse_configuration(const struct rlimit *saved_rlimit_nofile,
2347 const struct rlimit *saved_rlimit_memlock) {
97d1fb94
LP		 2348 int r;
2349
a9fd4cd1
FB		 2350 assert(saved_rlimit_nofile);
2351 assert(saved_rlimit_memlock);
2352
fb39af4c
ZJS		 2353 /* Assign configuration defaults */
2354 reset_arguments();
2355
97d1fb94 2356 r = parse_config_file();
470a5e6d
ZJS		 2357 if (r < 0)
2358 log_warning_errno(r, "Failed to parse config file, ignoring: %m");
97d1fb94
LP		 2359
2360 if (arg_system) {
2361 r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0);
2362 if (r < 0)
2363 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
2364 }
2365
a9fd4cd1
FB		 2366 /* Initialize some default rlimits for services if they haven't been configured */
2367 fallback_rlimit_nofile(saved_rlimit_nofile);
2368 fallback_rlimit_memlock(saved_rlimit_memlock);
2369
97d1fb94
LP		 2370 /* Note that this also parses bits from the kernel command line, including "debug". */
2371 log_parse_environment();
2372
db33214b 2373 /* Initialize the show status setting if it hasn't been set explicitly yet */
7a293242 2374 if (arg_show_status == _SHOW_STATUS_INVALID)
db33214b
LP		 2375 arg_show_status = SHOW_STATUS_YES;
2376
97d1fb94
LP		 2377 return 0;
2378}
2379
b0d7c989
LP		 2380static int safety_checks(void) {
2381
febf46a4 2382 if (getpid_cached() == 1 &&
baaa35ad
ZJS		 2383 arg_action != ACTION_RUN)
2384 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
2385 "Unsupported execution mode while PID 1.");
febf46a4
LP		 2386
2387 if (getpid_cached() == 1 &&
baaa35ad
ZJS		 2388 !arg_system)
2389 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
2390 "Can't run --user mode as PID 1.");
febf46a4
LP		 2391
2392 if (arg_action == ACTION_RUN &&
2393 arg_system &&
baaa35ad
ZJS		 2394 getpid_cached() != 1)
2395 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
2396 "Can't run system mode unless PID 1.");
febf46a4 2397
b0d7c989 2398 if (arg_action == ACTION_TEST &&
baaa35ad
ZJS		 2399 geteuid() == 0)
2400 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
2401 "Don't run test mode as root.");
b0d7c989
LP		 2402
2403 if (!arg_system &&
2404 arg_action == ACTION_RUN &&
baaa35ad
ZJS		 2405 sd_booted() <= 0)
2406 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
2407 "Trying to run as user instance, but the system has not been booted with systemd.");
b0d7c989
LP		 2408
2409 if (!arg_system &&
2410 arg_action == ACTION_RUN &&
baaa35ad
ZJS		 2411 !getenv("XDG_RUNTIME_DIR"))
2412 return log_error_errno(SYNTHETIC_ERRNO(EUNATCH),
2413 "Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
b0d7c989
LP		 2414
2415 if (arg_system &&
2416 arg_action == ACTION_RUN &&
baaa35ad
ZJS		 2417 running_in_chroot() > 0)
2418 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
2419 "Cannot be run in a chroot() environment.");
b0d7c989
LP		 2420
2421 return 0;
2422}
2423
74da609f
LP		 2424static int initialize_security(
2425 bool *loaded_policy,
2426 dual_timestamp *security_start_timestamp,
2427 dual_timestamp *security_finish_timestamp,
2428 const char **ret_error_message) {
2429
2430 int r;
2431
2432 assert(loaded_policy);
2433 assert(security_start_timestamp);
2434 assert(security_finish_timestamp);
2435 assert(ret_error_message);
2436
2437 dual_timestamp_get(security_start_timestamp);
2438
97149f40 2439 r = mac_selinux_setup(loaded_policy);
74da609f
LP		 2440 if (r < 0) {
2441 *ret_error_message = "Failed to load SELinux policy";
2442 return r;
2443 }
2444
2445 r = mac_smack_setup(loaded_policy);
2446 if (r < 0) {
2447 *ret_error_message = "Failed to load SMACK policy";
2448 return r;
2449 }
2450
2ffadd3c
Y		 2451 r = mac_apparmor_setup();
2452 if (r < 0) {
2453 *ret_error_message = "Failed to load AppArmor policy";
2454 return r;
2455 }
2456
74da609f
LP		 2457 r = ima_setup();
2458 if (r < 0) {
2459 *ret_error_message = "Failed to load IMA policy";
2460 return r;
2461 }
2462
2463 dual_timestamp_get(security_finish_timestamp);
2464 return 0;
2465}
2466
263162da
LP		 2467static void test_summary(Manager *m) {
2468 assert(m);
2469
2470 printf("-> By units:\n");
2471 manager_dump_units(m, stdout, "\t");
2472
2473 printf("-> By jobs:\n");
2474 manager_dump_jobs(m, stdout, "\t");
2475}
2476
efeb853f
LP		 2477static int collect_fds(FDSet **ret_fds, const char **ret_error_message) {
2478 int r;
2479
2480 assert(ret_fds);
2481 assert(ret_error_message);
2482
2483 r = fdset_new_fill(ret_fds);
2484 if (r < 0) {
2485 *ret_error_message = "Failed to allocate fd set";
2486 return log_emergency_errno(r, "Failed to allocate fd set: %m");
2487 }
2488
2489 fdset_cloexec(*ret_fds, true);
2490
2491 if (arg_serialization)
2492 assert_se(fdset_remove(*ret_fds, fileno(arg_serialization)) >= 0);
2493
2494 return 0;
2495}
2496
2e51b31c
LP		 2497static void setup_console_terminal(bool skip_setup) {
2498
2499 if (!arg_system)
2500 return;
2501
2502 /* Become a session leader if we aren't one yet. */
2503 (void) setsid();
2504
2505 /* If we are init, we connect stdin/stdout/stderr to /dev/null and make sure we don't have a controlling
2506 * tty. */
2507 (void) release_terminal();
2508
2509 /* Reset the console, but only if this is really init and we are freshly booted */
2510 if (getpid_cached() == 1 && !skip_setup)
2511 (void) console_setup();
2512}
2513
aa40ff07
LP		 2514static bool early_skip_setup_check(int argc, char *argv[]) {
2515 bool found_deserialize = false;
2516 int i;
2517
2518 /* Determine if this is a reexecution or normal bootup. We do the full command line parsing much later, so
2519 * let's just have a quick peek here. Note that if we have switched root, do all the special setup things
2520 * anyway, even if in that case we also do deserialization. */
2521
2522 for (i = 1; i < argc; i++) {
aa40ff07
LP		 2523 if (streq(argv[i], "--switched-root"))
2524 return false; /* If we switched root, don't skip the setup. */
2525 else if (streq(argv[i], "--deserialize"))
2526 found_deserialize = true;
2527 }
2528
2529 return found_deserialize; /* When we are deserializing, then we are reexecuting, hence avoid the extensive setup */
2530}
2531
0e06a031
LP		 2532static int save_env(void) {
2533 char **l;
2534
2535 l = strv_copy(environ);
2536 if (!l)
2537 return -ENOMEM;
2538
2539 strv_free_and_replace(saved_env, l);
2540 return 0;
2541}
2542
60918275 2543int main(int argc, char *argv[]) {
625e8690
LP		 2544
2545 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL, userspace_timestamp = DUAL_TIMESTAMP_NULL, kernel_timestamp = DUAL_TIMESTAMP_NULL,
2546 security_start_timestamp = DUAL_TIMESTAMP_NULL, security_finish_timestamp = DUAL_TIMESTAMP_NULL;
ddfa8b0b
LP		 2547 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0),
2548 saved_rlimit_memlock = RLIMIT_MAKE_CONST(RLIM_INFINITY); /* The original rlimits we passed
2549 * in. Note we use different values
2550 * for the two that indicate whether
2551 * these fields are initialized! */
625e8690
LP		 2552 bool skip_setup, loaded_policy = false, queue_default_job = false, first_boot = false, reexecute = false;
2553 char *switch_root_dir = NULL, *switch_root_init = NULL;
9d76d730 2554 usec_t before_startup, after_startup;
625e8690 2555 static char systemd[] = "systemd";
9d76d730 2556 char timespan[FORMAT_TIMESPAN_MAX];
625e8690
LP		 2557 const char *shutdown_verb = NULL, *error_message = NULL;
2558 int r, retval = EXIT_FAILURE;
2559 Manager *m = NULL;
a16e1123 2560 FDSet *fds = NULL;
27b14a22 2561
d72a8f10 2562 /* SysV compatibility: redirect init → telinit */
6808a0bc 2563 redirect_telinit(argc, argv);
2cb1a60d 2564
d72a8f10 2565 /* Take timestamps early on */
c3a170f3
HH		 2566 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
2567 dual_timestamp_get(&userspace_timestamp);
2568
d72a8f10
LP		 2569 /* Figure out whether we need to do initialize the system, or if we already did that because we are
2570 * reexecuting */
aa40ff07 2571 skip_setup = early_skip_setup_check(argc, argv);
d03bc1b8 2572
d72a8f10
LP		 2573 /* If we get started via the /sbin/init symlink then we are called 'init'. After a subsequent reexecution we
2574 * are then called 'systemd'. That is confusing, hence let's call us systemd right-away. */
f3b6a3ed 2575 program_invocation_short_name = systemd;
eee8b7ab 2576 (void) prctl(PR_SET_NAME, systemd);
5d6b1584 2577
d72a8f10 2578 /* Save the original command line */
36fea155 2579 save_argc_argv(argc, argv);
f3b6a3ed 2580
0e06a031
LP		 2581 /* Save the original environment as we might need to restore it if we're requested to execute another
2582 * system manager later. */
2583 r = save_env();
2584 if (r < 0) {
2585 error_message = "Failed to copy environment block";
2586 goto finish;
2587 }
a5cede8c 2588
6fdb8de4 2589 /* Make sure that if the user says "syslog" we actually log to the journal. */
c1dc6153 2590 log_set_upgrade_syslog_to_journal(true);
bbe63281 2591
df0ff127 2592 if (getpid_cached() == 1) {
b5752d23
LP		 2593 /* When we run as PID 1 force system mode */
2594 arg_system = true;
2595
48a601fe 2596 /* Disable the umask logic */
90dc8c2e
MG		 2597 umask(0);
2598
92890452
LP		 2599 /* Make sure that at least initially we do not ever log to journald/syslogd, because it might not be
2600 * activated yet (even though the log socket for it exists). */
d075092f
LP		 2601 log_set_prohibit_ipc(true);
2602
48a601fe
LP		 2603 /* Always reopen /dev/console when running as PID 1 or one of its pre-execve() children. This is
2604 * important so that we never end up logging to any foreign stderr, for example if we have to log in a
2605 * child process right before execve()'ing the actual binary, at a point in time where socket
2606 * activation stderr/stdout area already set up. */
2607 log_set_always_reopen_console(true);
48a601fe 2608
92890452 2609 if (detect_container() <= 0) {
4f8d551f 2610
92890452 2611 /* Running outside of a container as PID 1 */
92890452
LP		 2612 log_set_target(LOG_TARGET_KMSG);
2613 log_open();
a866073d 2614
92890452
LP		 2615 if (in_initrd())
2616 initrd_timestamp = userspace_timestamp;
c3ba6250 2617
92890452
LP		 2618 if (!skip_setup) {
2619 r = mount_setup_early();
2620 if (r < 0) {
2621 error_message = "Failed to mount early API filesystems";
2622 goto finish;
2623 }
2624
0a2eef1e
LP		 2625 /* Let's open the log backend a second time, in case the first time didn't
2626 * work. Quite possibly we have mounted /dev just now, so /dev/kmsg became
2627 * available, and it previously wasn't. */
2628 log_open();
2629
6123dfaa
ZJS		 2630 disable_printk_ratelimit();
2631
92890452
LP		 2632 r = initialize_security(
2633 &loaded_policy,
2634 &security_start_timestamp,
2635 &security_finish_timestamp,
2636 &error_message);
2637 if (r < 0)
2638 goto finish;
d723cd65 2639 }
eee8b7ab 2640
92890452 2641 if (mac_selinux_init() < 0) {
a9ba0e32 2642 error_message = "Failed to initialize SELinux support";
96694e99 2643 goto finish;
92890452 2644 }
0b3325e7 2645
92890452
LP		 2646 if (!skip_setup)
2647 initialize_clock();
2648
2649 /* Set the default for later on, but don't actually open the logs like this for now. Note that
2650 * if we are transitioning from the initrd there might still be journal fd open, and we
2651 * shouldn't attempt opening that before we parsed /proc/cmdline which might redirect output
2652 * elsewhere. */
2653 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
2654
2655 } else {
2656 /* Running inside a container, as PID 1 */
92890452
LP		 2657 log_set_target(LOG_TARGET_CONSOLE);
2658 log_open();
2659
2660 /* For later on, see above... */
2661 log_set_target(LOG_TARGET_JOURNAL);
2662
45250e66 2663 /* clear the kernel timestamp, because we are in a container */
92890452 2664 kernel_timestamp = DUAL_TIMESTAMP_NULL;
cb6531be 2665 }
7948c4df 2666
92890452 2667 initialize_coredump(skip_setup);
a866073d 2668
92890452
LP		 2669 r = fixup_environment();
2670 if (r < 0) {
2671 log_emergency_errno(r, "Failed to fix up PID 1 environment: %m");
2672 error_message = "Failed to fix up PID1 environment";
2673 goto finish;
2674 }
a866073d 2675
92890452
LP		 2676 /* Try to figure out if we can use colors with the console. No need to do that for user instances since
2677 * they never log into the console. */
3a18b604 2678 log_show_color(colors_enabled());
92890452 2679
c76cf844
AK		 2680 r = make_null_stdio();
2681 if (r < 0)
92890452 2682 log_warning_errno(r, "Failed to redirect standard streams to /dev/null, ignoring: %m");
f84f9974 2683
a132bef0 2684 /* Load the kernel modules early. */
2e75e2a8
DM		 2685 if (!skip_setup)
2686 kmod_setup();
2e75e2a8 2687
3196e423 2688 /* Mount /proc, /sys and friends, so that /proc/cmdline and /proc/$PID/fd is available. */
f74349d8 2689 r = mount_setup(loaded_policy, skip_setup);
cb6531be
ZJS		 2690 if (r < 0) {
2691 error_message = "Failed to mount API filesystems";
8efe3c01 2692 goto finish;
cb6531be 2693 }
c18ecf03
LP		 2694
2695 /* The efivarfs is now mounted, let's read the random seed off it */
2696 (void) efi_take_random_seed();
209b2592
FB		 2697
2698 /* Cache command-line options passed from EFI variables */
2699 if (!skip_setup)
2700 (void) cache_efi_options_variable();
3196e423
LP		 2701 } else {
2702 /* Running as user instance */
2703 arg_system = false;
2704 log_set_target(LOG_TARGET_AUTO);
2705 log_open();
2706
2707 /* clear the kernel timestamp, because we are not PID 1 */
2708 kernel_timestamp = DUAL_TIMESTAMP_NULL;
2709
2710 if (mac_selinux_init() < 0) {
2711 error_message = "Failed to initialize SELinux support";
2712 goto finish;
2713 }
0c85a4f3 2714 }
4ade7963 2715
a9fd4cd1
FB		 2716 /* Save the original RLIMIT_NOFILE/RLIMIT_MEMLOCK so that we can reset it later when
2717 * transitioning from the initrd to the main systemd or suchlike. */
2718 save_rlimits(&saved_rlimit_nofile, &saved_rlimit_memlock);
2719
4ade7963 2720 /* Reset all signal handlers. */
ce30c8dc
LP		 2721 (void) reset_all_signal_handlers();
2722 (void) ignore_signals(SIGNALS_IGNORE, -1);
078e4539 2723
ffe5c01e
FB		 2724 (void) parse_configuration(&saved_rlimit_nofile, &saved_rlimit_memlock);
2725
2726 r = parse_argv(argc, argv);
2727 if (r < 0) {
2728 error_message = "Failed to parse commandline arguments";
f170852a 2729 goto finish;
ffe5c01e 2730 }
10c961b9 2731
b0d7c989
LP		 2732 r = safety_checks();
2733 if (r < 0)
fe783b03 2734 goto finish;
fe783b03 2735
5c08257b 2736 if (IN_SET(arg_action, ACTION_TEST, ACTION_HELP, ACTION_DUMP_CONFIGURATION_ITEMS, ACTION_DUMP_BUS_PROPERTIES, ACTION_BUS_INTROSPECT))
0221d68a 2737 (void) pager_open(arg_pager_flags);
b0d7c989
LP		 2738
2739 if (arg_action != ACTION_RUN)
74e7579c 2740 skip_setup = true;
b87c2aa6 2741
fa0f4d8a 2742 if (arg_action == ACTION_HELP) {
37ec0fdd 2743 retval = help() < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
f170852a 2744 goto finish;
9ba0bc4e
ZJS		 2745 } else if (arg_action == ACTION_VERSION) {
2746 retval = version();
2747 goto finish;
fa0f4d8a 2748 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
e537352b 2749 unit_dump_config_items(stdout);
22f4096c 2750 retval = EXIT_SUCCESS;
e537352b 2751 goto finish;
bbc1acab
YW		 2752 } else if (arg_action == ACTION_DUMP_BUS_PROPERTIES) {
2753 dump_bus_properties(stdout);
2754 retval = EXIT_SUCCESS;
2755 goto finish;
5c08257b
ZJS		 2756 } else if (arg_action == ACTION_BUS_INTROSPECT) {
2757 r = bus_manager_introspect_implementations(stdout, arg_bus_introspect);
2758 retval = r >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
2759 goto finish;
f170852a
LP		 2760 }
2761
4c701096 2762 assert_se(IN_SET(arg_action, ACTION_RUN, ACTION_TEST));
f170852a 2763
5a2e0c62
LP		 2764 /* Move out of the way, so that we won't block unmounts */
2765 assert_se(chdir("/") == 0);
2766
dea374e8 2767 if (arg_action == ACTION_RUN) {
d247f232
LP		 2768 if (!skip_setup) {
2769 /* Apply the systemd.clock_usec= kernel command line switch */
45250e66 2770 apply_clock_update();
a70c72a0 2771
d247f232
LP		 2772 /* Apply random seed from kernel command line */
2773 cmdline_take_random_seed();
2774 }
2775
c6885f5f
FB		 2776 /* A core pattern might have been specified via the cmdline. */
2777 initialize_core_pattern(skip_setup);
2778
efeb853f 2779 /* Close logging fds, in order not to confuse collecting passed fds and terminal logic below */
a70c72a0
LP		 2780 log_close();
2781
2782 /* Remember open file descriptors for later deserialization */
efeb853f
LP		 2783 r = collect_fds(&fds, &error_message);
2784 if (r < 0)
dea374e8 2785 goto finish;
a16e1123 2786
2e51b31c
LP		 2787 /* Give up any control of the console, but make sure its initialized. */
2788 setup_console_terminal(skip_setup);
56d96fc0 2789
a70c72a0
LP		 2790 /* Open the logging devices, if possible and necessary */
2791 log_open();
56d96fc0 2792 }
4ade7963 2793
31aef7ff 2794 log_execution_mode(&first_boot);
a5dab5ce 2795
2d776038 2796 r = initialize_runtime(skip_setup,
3023f2fe 2797 first_boot,
2d776038
LP		 2798 &saved_rlimit_nofile,
2799 &saved_rlimit_memlock,
2800 &error_message);
2801 if (r < 0)
2802 goto finish;
4096d6f5 2803
e0a3da1f
ZJS		 2804 r = manager_new(arg_system ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
2805 arg_action == ACTION_TEST ? MANAGER_TEST_FULL : 0,
2806 &m);
e96d6be7 2807 if (r < 0) {
da927ba9 2808 log_emergency_errno(r, "Failed to allocate manager object: %m");
cb6531be 2809 error_message = "Failed to allocate manager object";
60918275
LP		 2810 goto finish;
2811 }
2812
9f9f0342
LP		 2813 m->timestamps[MANAGER_TIMESTAMP_KERNEL] = kernel_timestamp;
2814 m->timestamps[MANAGER_TIMESTAMP_INITRD] = initrd_timestamp;
2815 m->timestamps[MANAGER_TIMESTAMP_USERSPACE] = userspace_timestamp;
d4ee7bd8
YW		 2816 m->timestamps[manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_SECURITY_START)] = security_start_timestamp;
2817 m->timestamps[manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_SECURITY_FINISH)] = security_finish_timestamp;
9e58ff9c 2818
85cb4151 2819 set_manager_defaults(m);
7b46fc6a 2820 set_manager_settings(m);
fd130612 2821 manager_set_first_boot(m, first_boot);
27d340c7 2822
bf4df7c3 2823 /* Remember whether we should queue the default job */
d3b1c508 2824 queue_default_job = !arg_serialization || arg_switched_root;
bf4df7c3 2825
9d76d730
LP		 2826 before_startup = now(CLOCK_MONOTONIC);
2827
d3b1c508 2828 r = manager_startup(m, arg_serialization, fds);
58f88d92 2829 if (r < 0) {
cefb3eda 2830 error_message = "Failed to start up manager";
58f88d92
ZJS		 2831 goto finish;
2832 }
a16e1123 2833
6acca5fc 2834 /* This will close all file descriptors that were opened, but not claimed by any unit. */
2feceb5e 2835 fds = fdset_free(fds);
74ca738f 2836 arg_serialization = safe_fclose(arg_serialization);
bf4df7c3
LP		 2837
2838 if (queue_default_job) {
6acca5fc 2839 r = do_queue_default_job(m, &error_message);
718db961 2840 if (r < 0)
37d88da7 2841 goto finish;
6acca5fc 2842 }
ab17a050 2843
6acca5fc 2844 after_startup = now(CLOCK_MONOTONIC);
60918275 2845
6acca5fc
LP		 2846 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
2847 "Loaded units and determined initial transaction in %s.",
2848 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
07672f49 2849
6acca5fc 2850 if (arg_action == ACTION_TEST) {
263162da 2851 test_summary(m);
6acca5fc
LP		 2852 retval = EXIT_SUCCESS;
2853 goto finish;
e965d56d 2854 }
d46de8a1 2855
3046b6db 2856 (void) invoke_main_loop(m,
a9fd4cd1
FB		 2857 &saved_rlimit_nofile,
2858 &saved_rlimit_memlock,
3046b6db
LP		 2859 &reexecute,
2860 &retval,
2861 &shutdown_verb,
2862 &fds,
2863 &switch_root_dir,
2864 &switch_root_init,
2865 &error_message);
f170852a 2866
60918275 2867finish:
b87c2aa6
ZJS		 2868 pager_close();
2869
92890452 2870 if (m) {
986935cf
FB		 2871 arg_reboot_watchdog = manager_get_watchdog(m, WATCHDOG_REBOOT);
2872 arg_kexec_watchdog = manager_get_watchdog(m, WATCHDOG_KEXEC);
92890452
LP		 2873 m = manager_free(m);
2874 }
60918275 2875
cc56fafe 2876 mac_selinux_finish();
b2bb3dbe 2877
3c7878f9
LP		 2878 if (reexecute)
2879 do_reexecute(argc, argv,
2880 &saved_rlimit_nofile,
2881 &saved_rlimit_memlock,
2882 fds,
2883 switch_root_dir,
2884 switch_root_init,
2885 &error_message); /* This only returns if reexecution failed */
a16e1123 2886
74ca738f 2887 arg_serialization = safe_fclose(arg_serialization);
2feceb5e 2888 fds = fdset_free(fds);
a16e1123 2889
0e06a031
LP		 2890 saved_env = strv_free(saved_env);
2891
349cc4a5 2892#if HAVE_VALGRIND_VALGRIND_H
54b434b1
LP		 2893 /* If we are PID 1 and running under valgrind, then let's exit
2894 * here explicitly. valgrind will only generate nice output on
2895 * exit(), not on exec(), hence let's do the former not the
2896 * latter here. */
8a2c1fbf
EJ		 2897 if (getpid_cached() == 1 && RUNNING_ON_VALGRIND) {
2898 /* Cleanup watchdog_device strings for valgrind. We need them
2899 * in become_shutdown() so normally we cannot free them yet. */
2900 watchdog_free_device();
2901 arg_watchdog_device = mfree(arg_watchdog_device);
7d9eea2b 2902 reset_arguments();
27fe58b7 2903 return retval;
8a2c1fbf 2904 }
54b434b1
LP		 2905#endif
2906
7e11a95e
EV		 2907#if HAS_FEATURE_ADDRESS_SANITIZER
2908 __lsan_do_leak_check();
2909#endif
2910
b9080b03 2911 if (shutdown_verb) {
7eb35049 2912 r = become_shutdown(shutdown_verb, retval);
4a36297c 2913 log_error_errno(r, "Failed to execute shutdown binary, %s: %m", getpid_cached() == 1 ? "freezing" : "quitting");
9b9881d7 2914 error_message = "Failed to execute shutdown binary";
b9080b03
FF		 2915 }
2916
8a2c1fbf
EJ		 2917 watchdog_free_device();
2918 arg_watchdog_device = mfree(arg_watchdog_device);
2919
df0ff127 2920 if (getpid_cached() == 1) {
cb6531be
ZJS		 2921 if (error_message)
2922 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
1fc464f6 2923 ANSI_HIGHLIGHT_RED "!!!!!!" ANSI_NORMAL,
bb259772
LP		 2924 "%s.", error_message);
2925 freeze_or_exit_or_reboot();
cb6531be 2926 }
c3b3c274 2927
7d9eea2b 2928 reset_arguments();
60918275
LP		 2929 return retval;
2930}
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